WorksheetsElectrons Part 2
Total questions: 12
Worksheet time: 44mins
1s2 2s2 2p6 3s2
Determine the number of valence electrons for chlorine.
5
2
7
5
How do you determine the number electrons in a neutral atom?
atomic number
symbol
atomic mass
7
8
9
10
How many valence electrons does carbon have?
4
5
6
7
USE THE PERIODIC TABLE
Determine the number of valence electrons for phosphorus?
31
5
15
4
What are valence electrons?
electrons in the first energy level
the total number of electrons in an atom
electrons in the outermost energy level
electrons in the middle energy level
How do electrons change energy levels?
they absorb or emit neutrons
they absorb or emit photons
they absorb or emit protons
they absorb or emit electrons
What is a qualitative way to determine an unknown element?
the number of protons
the number of electrons
compare an atomic emission spectrum or flame test
the number of neutrons
