WorksheetsAtomic Number, Atomic Mass
Total questions: 18
Worksheet time: 10mins
A student creates the model of a carbon-12 atom shown. He wants to add 3 more sub-atomic particles to the model to create a carbon-15 atom. Identify how many protons and neutrons he should add to the model.
3 Neutrons
0 Protons
2 Neutrons
1 Proton
1 Neutron
2 Protons
0 Neutrons
3 Protons
What is the mass of a carbon atom that has 6 protons, 7 neutrons, and 6 electrons?
6
7
13
19
Neutral atoms have an equal number of
electrons and neutrons
protons and neutrons
protons and electrons
protons, neutrons, and electrons
An atom of tin has an atomic number of 50 and a mass number of 119. How many protons, electrons, and neutrons are found in one neutral atom of tin?
50 protons, 69 electrons, 50 neutrons
50 protons, 50 electrons, 69 neutrons
69 protons, 50 electrons, 69 neutrons
69 protons, 69 electrons, 50 neutrons
Mass number
Subatomic particles with a negative charge
Electrons
Neutrons
Protons
Quarks
How many neutrons does calcium have?
20
40
60
0
Which subatomic particle determines the identity of an element?
protons
neutrons
electrons
Which element is this?
Nickel
Neon
Sodium
Nitrogen
An atom has:
8 Protons
7 Neutrons
6 Electrons
What is the mass number?
(a)
An atom has:
8 Protons
7 Neutrons
6 Electrons
What is the total charge?
(a)
24Na-2
Use the atomic symbol above to determine
how many electrons this atom has
(a)
An atom has:
8 Protons
7 Neutrons
6 Electrons
What is the total charge?
(a)
Nitrogen - 12
Use the isotope notation above to determine
how many neutrons this atom has
(a)
