help please

1/ if the electron is 10 what is the electron configuration, protons, neutron, mass number, group, period

2/ if protons are 15 and neutrons are 16 what is the electron, electron cinfiguration, mass number, group, period

3/ if the electron configuration is 2:8:3 and the mass number is 27 what is the elctron, proton, neutron, group, period

4/ if the neutrons are 18 and the group is 17 the period 3 what is the electron, electron configuration, proton, mass number

Tags:

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.

The number of electrons is the same as the number of protons (in neutral atom) and with the atomic number (which you can see in the periodic table). So:

1/ It is neon; 10 electrons, protons and nutrons. Electronic configuration is 1s2, 2s2, 2p6

2/It is phosphorus; 15 electrons, configuration 1s2, 2s2, 2p6, 3s2, 3p3. Group 15, period 3. Ar=30.97.

3/Aluminium; 13 protons and electrons and 14 protons, group 13, period 3

4/Chlorine, Ar=35.45, 17 electrons and protons, configuration 1s2, 2s2, 2p6, 3s2, 3p5

You should learn how to use the periodic table. :)

WebElements: the periodic table on the WWW [http://www.webelements.com/]

Copyright 1993-20010 Mark Winter [The University of Sheffield and WebElements Ltd, UK]. All rights reserved.