Subatomic Particles Pretest

The atomic number of an element is equal to the number of ______.

• Neutrons

• Protons

• Electrons

• Atoms

What is the atomic number of sodium (Na)?

What is the atomic number of fluorine (F)?

How many protons does Aluminum (Al) have?

Tags

NGSS.MS-PS1-1

How many protons does titanium (Ti) have?

Tags

NGSS.MS-PS1-1

What is the mass number of an atom with 15 protons and 14 neutrons?

Tags

NGSS.MS-PS1-1

If the mass number of an atom is 40 amu and the atomic number is 22, how many neutrons are there?

Tags

NGSS.MS-PS1-1

What is the mass number of an oxygen atom with 9 neutrons?

Tags

NGSS.MS-PS1-1

What is the mass number of an nitrogen atom with 9 neutrons?

Tags

NGSS.MS-PS1-1

What two subatomic particles contribute to the mass number?

• Electrons

• Protons

• Neutrons