https://padlet.com/science92/3SEPeriodicTrends Trends across Period 3 en-us 2021-10-14 23:06:18 UTC 2021-10-15 01:19:10 UTC hello@padlet.com https://padlet.net/icons/png/1f469-1f52c.png https://padlet.com/science92/3SEPeriodicTrends/wish/1818441643 From left to right across a period, the elements become less metallic ]]> 2021-10-15 00:54:20 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818441643 https://padlet.com/science92/3SEPeriodicTrends/wish/1818444059 metallic elements form cations and non-metallic elements form anions as metallic elements are generally located in groups 1-3 with less valence electrons and hence lose them more readily]]> 2021-10-15 00:55:24 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818444059 https://padlet.com/science92/3SEPeriodicTrends/wish/1818444345 From left to right, metallic properties of metals decrease and non-metallic properties of metals increase.]]> 2021-10-15 00:55:33 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818444345 https://padlet.com/science92/3SEPeriodicTrends/wish/1818444846 chemical properties of the elements are different because the number of valence electrons differ across the period ]]> 2021-10-15 00:55:47 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818444846 https://padlet.com/science92/3SEPeriodicTrends/wish/1818445157 from left to right the elements get less metallic , from sodium to aluminium it is metal and from silicon to argon it is non-metallic]]> 2021-10-15 00:55:55 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818445157 https://padlet.com/science92/3SEPeriodicTrends/wish/1818445630 Different chemical properties, diff number of valence electrons ]]> 2021-10-15 00:56:09 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818445630 https://padlet.com/science92/3SEPeriodicTrends/wish/1818446416 Chemical properties are different]]> 2021-10-15 00:56:31 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818446416 https://padlet.com/science92/3SEPeriodicTrends/wish/1818447997 Physical properties are different]]> 2021-10-15 00:57:15 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818447997 https://padlet.com/science92/3SEPeriodicTrends/wish/1818448440 chemical properties are different as number of valence electrons differ, and number of valence electrons determine an elements chemical properties]]> 2021-10-15 00:57:28 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818448440 https://padlet.com/science92/3SEPeriodicTrends/wish/1818448924 - sodium magnesium and aluminium are metallic (more metallic)
- silicon phosphorus sulfur and chlorine are non-metallic (non metallic)]]> 2021-10-15 00:57:42 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818448924 https://padlet.com/science92/3SEPeriodicTrends/wish/1818448993 Different physical properties, different atomic mass]]> 2021-10-15 00:57:44 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818448993 https://padlet.com/science92/3SEPeriodicTrends/wish/1818450289 elements sodium, magnesium and aluminium exhibit metallic properties whereas elements silicon, phosphorus, sulfur, chlorine and argon exhibit non metallic properties]]> 2021-10-15 00:58:20 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818450289 https://padlet.com/science92/3SEPeriodicTrends/wish/1818450793 Different physical properties due to different relative atomic mass ]]> 2021-10-15 00:58:35 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818450793 https://padlet.com/science92/3SEPeriodicTrends/wish/1818450858 they have different physical properties as the atomic masses are different]]> 2021-10-15 00:58:37 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818450858 https://padlet.com/science92/3SEPeriodicTrends/wish/1818451421 - they have different chemical properties as they have varying Valence electrons]]> 2021-10-15 00:58:53 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818451421 https://padlet.com/science92/3SEPeriodicTrends/wish/1818453219 The first three elements are metallic, the last five elements are non-metallic. The metallic properties correspond with group numbers, the smaller ones (Grp 1-3) being metallic and the larger ones (group 4 onwards)being non-metallic.]]> 2021-10-15 00:59:40 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818453219 https://padlet.com/science92/3SEPeriodicTrends/wish/1818453707 Chemical properties are different because:
1) they have different number of valence electrons
2) some are metals, some are not, so reactions are categorised differently. Between the metals, reactions can also differ eg. by speed]]> 2021-10-15 00:59:54 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818453707 https://padlet.com/science92/3SEPeriodicTrends/wish/1818453760 Metals form giant ionic crystal lattice structure but non metals forms simple molecular and giant molecular structure]]> 2021-10-15 00:59:55 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818453760 https://padlet.com/science92/3SEPeriodicTrends/wish/1818454034 different because they have different number of valence electrons]]> 2021-10-15 01:00:03 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818454034 https://padlet.com/science92/3SEPeriodicTrends/wish/1818454488 Metallic substances are substances which loses its valence electrons easily to get a positive cation with a stable noble gas configuration and a sea of delocalised electrons. This happens more from the earlier group numbers ]]> 2021-10-15 01:00:15 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818454488 https://padlet.com/science92/3SEPeriodicTrends/wish/1818455023 - they have different physical properties as the number of neutrons is increasing across the period]]> 2021-10-15 01:00:32 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818455023 https://padlet.com/science92/3SEPeriodicTrends/wish/1818455363 different as there are different number of valence electrons ; sodium , aluminium , magnesium can conduct electricity , high melting and boiling point , insoluble in water ; silicon , phosphorous , sulfur , chlorine , argon cannot conduct electricity]]> 2021-10-15 01:00:41 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818455363 https://padlet.com/science92/3SEPeriodicTrends/wish/1818455626 The thermal stability of the oxides of the elements decreases from the left to the right of the period, as the atomic mass increases ]]> 2021-10-15 01:00:47 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818455626 https://padlet.com/science92/3SEPeriodicTrends/wish/1818457119 Physical properties are different due to different number of neutrons and protons in each atom
Each atom have different atomic mass]]> 2021-10-15 01:01:28 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818457119 https://padlet.com/science92/3SEPeriodicTrends/wish/1818457548 Metals can conduct electricity in solid and molten state. Non metals cannot conduct electricity at all except graphite.]]> 2021-10-15 01:01:40 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818457548 https://padlet.com/science92/3SEPeriodicTrends/wish/1818457917 metals will form a giant metallic crystal lattice structure and non-metals will form a simple molecular structure]]> 2021-10-15 01:01:51 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818457917 https://padlet.com/science92/3SEPeriodicTrends/wish/1818458124 Stable
Metals react to form acidic oxides, non-metals react to form basic oxides]]> 2021-10-15 01:01:56 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818458124 https://padlet.com/science92/3SEPeriodicTrends/wish/1818458317 The metallic atoms would be oxides with ionic bonds between the positively charged cations and the negatively charged anions to have a giant ionic crystal lattice structure. The non-metallic atoms would form oxides that had a simple molecular structure with strong covalent bonds.]]> 2021-10-15 01:02:02 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818458317 https://padlet.com/science92/3SEPeriodicTrends/wish/1818458824 the metallic elements from the left side of the period form oxides with a giant ionic crystal lattice structure while the non-metallic elements on the right side of the period form oxides with a simple molecular structure ]]> 2021-10-15 01:02:15 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818458824 https://padlet.com/science92/3SEPeriodicTrends/wish/1818459387 Metallic oxides react with acids to form salt and water, Non-metallic oxides react with alkali to form salt and water]]> 2021-10-15 01:02:31 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818459387 https://padlet.com/science92/3SEPeriodicTrends/wish/1818459563 They react more with bases as the groups increase]]> 2021-10-15 01:02:36 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818459563 https://padlet.com/science92/3SEPeriodicTrends/wish/1818459832 Metal oxides are basic, non metal oxides are acidic ]]> 2021-10-15 01:02:41 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818459832 https://padlet.com/science92/3SEPeriodicTrends/wish/1818462093 the oxides are basic to acidic. sodium and magnesium form basic oxides. aluminium forms amphoteric oxide and non metals like sulfur will form acidic oxides ]]> 2021-10-15 01:03:47 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818462093 https://padlet.com/science92/3SEPeriodicTrends/wish/1818462152 The have the same number of valence shells of 3. ]]> 2021-10-15 01:03:49 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818462152 https://padlet.com/science92/3SEPeriodicTrends/wish/1818462760 Elements on the right are metals an form giant metallic crystal lattice structures, elements on the left are non metals and form simple/ giant molecular structures ]]> 2021-10-15 01:04:07 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818462760 https://padlet.com/science92/3SEPeriodicTrends/wish/1818462873 - sodium and magnesium’s oxides form basic oxides while aluminium oxide forms amphoteric oxide
- the non-metals in period three form acidic oxides]]> 2021-10-15 01:04:11 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818462873 https://padlet.com/science92/3SEPeriodicTrends/wish/1818462994 Metals form cations to react with oxides to form an ionic crystal lattice structure. Non-metals share electrons to bond with oxygen, forming a simple molecular structure. This corresponds with the metallic properties of atoms, in the sense that the first three elements are the ones to form ions and the last four are to form molecules.]]> 2021-10-15 01:04:14 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818462994 https://padlet.com/science92/3SEPeriodicTrends/wish/1818463193 The first 2 elements of period 3 form basic oxides, aluminium forms amphoteric oxide, elements in group IV to VII form acidic oxides while Argon is unreactive. ]]> 2021-10-15 01:04:19 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818463193 https://padlet.com/science92/3SEPeriodicTrends/wish/1818463660 The metals form ionic bonds with oxygen while non-metals form covalent bonds oxygen]]> 2021-10-15 01:04:33 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818463660 https://padlet.com/science92/3SEPeriodicTrends/wish/1818464289 From left to right, the oxides of the elements behaves as a basic oxide which reacts with acids, to an amphoteric oxide which reacts with both acids and alkalis and to acidic oxides which reacts with alkalis]]> 2021-10-15 01:04:47 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818464289 https://padlet.com/science92/3SEPeriodicTrends/wish/1818464864 Metals will form oxides with giant ionic crystal lattice structure, whereas non-metals produce oxides with simple molecular structure.

]]> 2021-10-15 01:05:02 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818464864 https://padlet.com/science92/3SEPeriodicTrends/wish/1818466024 elements like sodium and magnesium oxide will form a giant ionic crystal lattice while non metals such as sulfur will form a simple molecular structure, sulfur dioxide ]]> 2021-10-15 01:05:39 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818466024 https://padlet.com/science92/3SEPeriodicTrends/wish/1818466109 They have different chemical properties a they have a different number of valence electrons so the different atoms would react differently.]]> 2021-10-15 01:05:41 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818466109 https://padlet.com/science92/3SEPeriodicTrends/wish/1818467459 metal oxides conduct electricity in aqueous and molten state while non metal oxides do not conduct electricity in any state except for graphite]]> 2021-10-15 01:06:22 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818467459 https://padlet.com/science92/3SEPeriodicTrends/wish/1818467597 Metal oxide can conduct electricity in molten and aqueous state, non-metal oxide cannot conduct electricity because it exist as molecules
Metal oxide have high melting and boiling point, non metal oxide have Low melting and boiling point 
Argon do not form oxides because it is unreactive
Silicon dioxide have high melting and boiling point ]]> 2021-10-15 01:06:26 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818467597 https://padlet.com/science92/3SEPeriodicTrends/wish/1818467899 As the period moves from left to right the elements get less reactive and hence it’s compound will get less stable to heat and will get displaced more easily ]]> 2021-10-15 01:06:34 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818467899 https://padlet.com/science92/3SEPeriodicTrends/wish/1818473380 The metals in period 3 form basic oxides that reacts with acids to form salt and water
Aluminium oxide form amphoteric oxide which reacts with both acids and alkalis
The non metals form acidic oxides that reacts with bases to form salt and water ]]> 2021-10-15 01:09:02 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818473380 https://padlet.com/science92/3SEPeriodicTrends/wish/1818474576 the basic oxides are able to react with acids to form salt and water
the amphoteric oxides react with both acids and alkalis to form salt and water
the acidic oxides react with alkali to form salt and water 
sodium magnesium and aluminium (metals) are decreasing in reactivity -> decreasing thermal stability]]> 2021-10-15 01:09:36 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818474576 https://padlet.com/science92/3SEPeriodicTrends/wish/1818487238 As the oxides of the elements move from left to right, the thermal stability decreases 
Argon does not form oxides as it is a noble gas ]]> 2021-10-15 01:15:14 UTC https://padlet.com/science92/3SEPeriodicTrends/wish/1818487238