Periodic Table, Bohr Diagrams and Lewis Dot Diagrams

What element has 7 valence electrons in the 4th energy level?

Which of these is a Noble gas?

• H

• Co

• F

• Ne

Which of these is a transition element?

• Sn

• Ni

• N

• Ar

What element has 45 protons?

Which element is a metalloid in Period 3?

Which element is the most reactive?

• Ba

• La

• Y

• Mo

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which element is in Period 5, and has 2 valence electrons?

Which element has 33 electrons in a neutral atom?

What is the charge on an atom of phosphorus if it has 15 protons and 18 electrons?

• 0 It is neutral.

• +3

• -3

• 33

What is the charge on an atom of copper with 29 protons, 35 neutrons and 26 electrons?

• 64 amu

• -1

• +6

• +3