SCIENCE NOTES GROUP by https://padlet.com/wongjanlyn/qv0zw2vluk4n By Angela, Charlene, Kelly, Janlyn and Janelle en-us 2018-05-13 14:55:46 UTC 2023-07-08 17:26:39 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Lovecookie.png Atoms - Cathodes and Anodes ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/260295309
  • Cathodes → minus sign —
  • Anodes → plus sign +
    • ]]>     2018-05-14 00:44:29 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/260295309     Can atoms be broken down into simpler atoms? wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/260295325 2018-05-14 00:44:36 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/260295325 What is nucleus of an atom? wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/260295984 2018-05-14 00:49:21 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/260295984 Atoms are made of even smaller particles - ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/260296043 Experimental evidence - used by Ernest Rutherford in 1911 - shows that an atom must contain a central nucleus.

    This was further evidence that an atom contains smaller particles and can be broken down.]]>     2018-05-14 00:49:51 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/260296043     Experimental evidence to further support Rutherford’s nuclear atom idea - ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/260297632 Electrons occupy particular orbits or shells around the nucleus of an atom.]]> 2018-05-14 00:59:42 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/260297632 wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/263196540 2018-05-24 00:30:27 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/263196540 Discovery of the neutron - ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/263197295 John Chadwick discovered the neutron in 1932, and realised that most of the mass was double the number of protons.]]> 2018-05-24 00:35:01 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/263197295 Why is most of the mass of an atom double the number of protons? ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/263197797 2018-05-24 00:37:48 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/263197797 Atoms and Their Charges - ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/263198000
  • Electron (negative)
  • Proton (positive)
  • Neutron (no charge)
    • ]]>     2018-05-24 00:38:47 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/263198000     wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/263198819 2018-05-24 00:44:14 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/263198819 First discovery that atoms can be broken down - ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/263199450 The electron which JJ Thompson discovered in 1897 showed that atoms contain smaller particles.]]> 2018-05-24 00:48:33 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/263199450 ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268542119 Thompson- found out that atoms could be broken down into sub-atomic particles
    Rutherford- central nucleus in positive charge which is surrounded by a cloud of negative charges
    Bohr- thinks that electrons surround central nucleus in orbits; electrons are fixed in position in electron shells (1913)
    Chadwick- the mass of the atom is double of mass of protons
    Schrödinger- used mathematical equations to describe the likelihood of finding an electron in a certain position ; nucleus contains protons and neutrons; electron cloud surrounding it
    A=10^-10
    Proton: 1.672623 x 10-27
    Electron:9.109390 x 10-39 ]]>     2018-06-26 03:04:05 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268542119     wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268542181 All matter is made of atoms]]> 2018-06-26 03:04:52 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268542181 Atoms cannot be broken down into anything simpler wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268542309 2018-06-26 03:06:19 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268542309 All the atoms of a particular element are identical to each other wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268542396 2018-06-26 03:07:16 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268542396 Used experimental evidence to show that an atom must contain a central nucleus. This was further evidence that an atom contained smaller peices wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268542704 2018-06-26 03:10:45 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268542704 Niels Bohr used experimental evidence to support the idea that electrons occupy particular orbits or shells around the nucleus of an atom wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268542898 2018-06-26 03:13:03 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268542898 Bohr wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268543060 2018-06-26 03:14:55 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268543060 Orbits-electron shells wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268543223 2018-06-26 03:16:56 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268543223 Orbits-electron shells wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268543415 2018-06-26 03:19:00 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268543415 How small is an atom? wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268543941 2018-06-26 03:23:31 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268543941 Mass of an atom wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268544013 SI unit for mass is kg

    ]]>     2018-06-26 03:24:15 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268544013     Use relative atomic mass to find out mass of atom wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268544304 2018-06-26 03:27:02 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268544304 ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268544416 Dalton-Atoms 
    Thompson- Electrons
    Rutherford- Central nucleus /protons
    Chadwick- neutrons in nucleus 
    ⭐️ Bohr- electron shells 
    Sub-atomic particles ➡️Protons 
     ➡️Neutrons ➡️ Electrons ]]>     2018-06-26 03:28:37 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268544416     wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268544742 2018-06-26 03:33:10 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268544742 Representation of an atom(Bohr’s model) wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268544764 2018-06-26 03:33:24 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268544764 ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268545187 2018-06-26 03:38:17 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268545187 ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268545401 Protons and neutrons contributes to mass of atom 
    Atoms are electrically neutral 
    Number of protons equals to number of electrons for atoms only
     ]]>     2018-06-26 03:40:46 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268545401     wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268545618 2018-06-26 03:42:44 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268545618 Atoms are electrically neutral wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268545663 2018-06-26 03:43:07 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268545663 ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268545781 2018-06-26 03:44:34 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268545781 🌟KEY🌟 wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268679805 2018-06-27 03:05:05 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268679805 charwenebear https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268680106 Dalton-atoms
    Thompson-electrons
    Rutherford-nucleus/protons
    Bohr-electron shells (electron orbits)
    Chadwick-neutrons]]>     2018-06-27 03:08:14 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268680106     Schrödinger - ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268680173 Where the electron cloud is most dense, the chance of finding the electron is greatest.]]> 2018-06-27 03:08:53 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268680173 wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268680352 2018-06-27 03:11:04 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268680352 ⬆️2 protons, 2 electrons, 2 neutrons⬆️ wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268680461 For the above diagram]]> 2018-06-27 03:12:19 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268680461 Which is heaviest - proton, neutron or electron? ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268680562 2018-06-27 03:13:32 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268680562 Neutrons and protons cannot be split wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268681410 2018-06-27 03:25:10 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268681410 ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268681432 2018-06-27 03:25:29 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268681432 charwenebear https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268681541 2018-06-27 03:27:02 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268681541 ISOTOPES-atoms of the same element with the same number of protons but different number of neutrons wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268682525 2018-06-27 03:41:19 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268682525 wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268682743 2018-06-27 03:44:13 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268682743 Protons and Electrons - ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268795876 They have the same number of positive and negative charges.]]> 2018-06-28 00:15:01 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268795876 wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268795942 2018-06-28 00:15:37 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268795942 ⬆️ISOTOPES⬆️ wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268796119 1)atoms of the same element
    2)with the same number of protons
    3)different number of neutrons     ]]>     2018-06-28 00:17:18 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268796119     Number of protons = Number of electrons charwenebear https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268796549 2018-06-28 00:21:13 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268796549 wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268797378 Atoms of the same element(Boron)
    With the same number of protons(5)
    Different number of neutrons(Boron-10 has 5 neutrons a Boron-11 has 6 neutrons)    ]]>     2018-06-28 00:30:19 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268797378     To find the number of neutrons: wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268797756 Mass number - number of protons]]> 2018-06-28 00:33:51 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268797756 limjanelle https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268798067 Dot-and-cross diagram]]> 2018-06-28 00:36:48 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268798067 Why is Hydrogen separated from the rest of the atoms in the Periodic table? wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268798985 2018-06-28 00:46:42 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268798985 ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268799015 2018-06-28 00:47:07 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268799015 Number of electrons = Number of protons(only for atoms) wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268799158 2018-06-28 00:49:05 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268799158 The Roman number on the top of the Periodic table represent the number of electron in the outermost shell wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268799560 2018-06-28 00:54:31 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268799560 ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268799638 2018-06-28 00:55:47 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268799638 Outermost=Valence wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268799747 2018-06-28 00:57:29 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268799747 Same row will have the same number of occupied electron shell wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268799853 2018-06-28 00:58:58 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268799853 limjanelle https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268799904 2018-06-28 00:59:45 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268799904 wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268799939 Column(Group)
    Row(Period)    ]]>     2018-06-28 01:00:14 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268799939     In the Periodic Table - ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268799958 Column = Group
    Row = Period]]>     2018-06-28 01:00:33 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268799958     ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268800049 2018-06-28 01:01:39 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268800049 wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268800072 2018-06-28 01:02:01 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268800072 Dot and Cross diagram wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268916945 1)1st shells-maximum 2 electrons
    2)2nd and 3rd shell-maximum 8 electrons 
    3)column-groups(Roman numerals: I,II,III)
     >number of outermost electron(valence)
    4)rows-period(Arabic numerals: 1,2,3)
     >number of occupied electron shells    ]]>     2018-06-29 00:18:37 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268916945     Noble gas(unreactive, inert) wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268918362 2018-06-29 00:37:03 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268918362 Electron Configuration-Summary of how many electrons are there in each shell wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268918514

    ]]>     2018-06-29 00:39:00 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268918514     ktlly https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268919319 2018-06-29 00:47:19 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/268919319 Historical development of atom wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269261473 -Atoms are made of even smaller particles
    -Unlike charges attract and like charges repel
    -Nuclues is much heavier than alpha particle itself
    -Nucleus is incredibly heavy, over 99% of the atom's weight is concentrated and is incredibly small
    -Rutherhood discovered a particle inside a nucleus, which is responsible for its positive charge➡️proton
    -James Chadwick➡️discovered a new particle➡️had no charge because they are electrically neutral➡️neutrons    ]]>     2018-07-03 11:19:38 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269261473     charwenebear https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269346709 2018-07-04 06:41:02 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269346709 limjanelle https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269348118 2018-07-04 06:59:16 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269348118 wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269349322 Group 0 is a noble gas(inert=unreactive) 
    Stable electronic configuration with full electron shells    ]]>     2018-07-04 07:12:54 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269349322     wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269350644 2018-07-04 07:25:48 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269350644 charwenebear https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269350702 2018-07-04 07:26:21 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269350702 Group 0 wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269515985 -Noble gas(unreactive=inert)
    -Stable electronic configuration with full electron shell

    ]]>     2018-07-06 00:32:11 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269515985     wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269517803 2018-07-06 00:41:34 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269517803 wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269518354 2018-07-06 00:49:42 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269518354 wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269518538 2018-07-06 00:52:35 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269518538 charwenebear https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269519042 2018-07-06 01:02:22 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269519042 wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269701358 -name doesn’t change if it’s positive ion. Eg. Aluminium atom➡️Aluminium ion. Lithium atom➡️Lithium ion. Magnesium atom➡️Magnesium ion etc.
    -name change if it’s negative ion. Eg. Fluorine atom➡️Fluoride ion. Oxygen atom➡️Oxide. Sulfur atom➡️Sulfide etc.[last three letters are -ide]




    ]]>     2018-07-09 05:09:44 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269701358     Negative Ions charwenebear https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269701421 2018-07-09 05:11:18 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269701421 charwenebear https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269701594 2018-07-09 05:16:06 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269701594 How are ions formed? wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269701677 2018-07-09 05:18:32 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269701677 wongjanlyn https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269701853 2018-07-09 05:22:34 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269701853 charwenebear https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269701862 2018-07-09 05:22:47 UTC https://padlet.com/wongjanlyn/qv0zw2vluk4n/wish/269701862