Atom Padlet Wall by Sabrina

2. NUCLEUS

sestrella2012 — 2014-09-11 15:17:46 UTC

The very small, very dense, positively charged center of an atom containing protons and neutrons, as well as other subatomic particles.

3. NEUTRON

sestrella2012 — 2014-09-11 15:17:51 UTC

A neutral subatomic particle having a mass of 1.0087 amu.

4. ELECTRON

sestrella2012 — 2014-09-11 15:17:53 UTC

A subatomic particle having a mass of 0.00054858 amu and a charge of 1-.

5. PROTON

sestrella2012 — 2014-09-11 15:17:56 UTC

A subatomic particle having a mass of 1.0073 amu and a charge of +1, found in thew nuclei of atoms.

6. ATOMIC MASS

sestrella2012 — 2014-09-11 15:18:00 UTC

One twelfth of a mass of an atom of the carbon-12 isotope; a unit used for stating atomic and formula weights; also called dalton.

7. ATOMIC NUMBER

sestrella2012 — 2014-09-11 15:18:05 UTC

Integral number of protons in the nucleus; defines the identity of element.

8. PERIODIC TABLE

sestrella2012 — 2014-09-11 15:18:10 UTC

An arrangement of elements in order of increasing atomic numbers that also emphasizes periodicity.

9. VALENCE ELECTRON

sestrella2012 — 2014-09-11 15:18:15 UTC

Outermost electrons of atoms; usually those involved in bonding.

10. ALKALI METALS

sestrella2012 — 2014-09-11 15:18:18 UTC

Metals of Group IA (Na, K, Rb).

11. ALKALINE EARTH METALS

sestrella2012 — 2014-09-11 15:18:32 UTC

Group IIA metals

15. LANTHANIDES

sestrella2012 — 2014-09-11 15:19:11 UTC

Elements 58 to 71 (after lanthanum)

16. ACTINIDES

sestrella2012 — 2014-09-11 15:19:12 UTC

Elements 90 to 103 (after actinium)

17. ELECTRONEGATIVITY

sestrella2012 — 2014-09-11 15:19:19 UTC

18. IONIZATION ENERGY

sestrella2012 — 2014-09-11 15:19:41 UTC

The minimum amount of energy required to remove the most loosely held electron of an isolated gaseous atom or ion.

19. ATOMIC RADIUS

sestrella2012 — 2014-09-11 15:19:52 UTC

Radius of an atom.

20. IONIC RADIUS

sestrella2012 — 2014-09-11 15:20:05 UTC

the measure of an atom's ion in a crystal lattice.

1. ATOM

sestrella2012 — 2014-09-11 15:35:58 UTC

The smallest particle of an element

12. TRANSITION METALS

sestrella2012 — 2014-09-11 15:37:06 UTC

"an element whose atom has a partially filled d sub-shell, or which can give rise to cations with an incomplete d sub-shell".

13. HALOGENS

sestrella2012 — 2014-09-11 15:37:53 UTC

Group VIIA elements: F, Cl, Br, I

14. NOBLE GASES

sestrella2012 — 2014-09-11 15:38:47 UTC

Elements of the periodic Group 0; also called rare gases; formerly called inert gases, He,Ne,Ar, Kr, Xe, Rn.

17. ELECTRONEGATIVELY

sestrella2012 — 2014-09-11 15:42:09 UTC

A measure of the relative tendency of an atom to attract electrons to itself when chemically combined with another atom.