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WorksheetsGrade 8 Chemistry pop quiz 1
Total questions: 24
Worksheet time: 16mins
What is the GREATEST number of electrons an atom can have in the 2nd shell?
2
3
6
8
Subatomic particles that have a negative charge
electrons
protons
atoms
neutrons
These are found in the nucleus and have a neutral charge.
proton
electron
neutron
Protons and neutrons
Which particles are located in the nucleus?
Protons & Electrons
Electrons & Neutrons
Protons & Neutrons
It depends on the type of atom
An atom has 25 protons and 30 neutrons. How many electrons are needed to make the atom neutral (zero charge)?
0
25
30
35
What is the atomic number of this atom?
4
5
8
9
What is the mass number of Potassium?
19
20
39
58
How many neutrons does an atom of Potassium have?
19
20
39
58
Groups contain the same amount of ___________________ electrons, and periods contain the same number of ____________________shells.
atom/ electron
outer/electron
electron /valence
protons/sea
Which element has an electron configuration of 2,5?
Oxygen
Nitrogen
Phosphorus
Carbon
How many energy levels Shells) does Oxygen have?
16
8
2
6
If both protons and neutrons are found in the nucleus, why is it positive?
The reason it is positive is because neutrons have a positive charge and protons have a negative charge.
The reason it is positive is because neutrons have a negative charge and protons have a positive charge
The reason it is positive is because neutrons have no charge and protons have a positive charge.
The reason it is positive is because neutrons have no charge and protons have a negative charge
