Atoms Assessment

What is the atomic number?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

The __________ of an atom is the sum of the protons and neutrons in the nucleus of that atom.

• mass number
• atomic number 
• atomic weuight
• isotope weight

What is the mass number of this atom?

• 1

• 3

• 4

• 7

What is the atomic number of this element?

• 79

• 196

• 117

• 197

Calculate the number of neutrons in an atom of Lithium. [tap the image]

• 3

• 4

• 7

• 2

An atom has a mass number of 14 and atomic number of 6. The number of neutrons in it is:

• 6

• 10

• 4

• 8

If a neutral atom has 10 electrons, how many protons does it have?

• 0

• 1

• 10

• 5

Charged particles formed by loss or gain of electrons from an atom are called _____

• electrons

• protons

• neutrons

• Ions

Atoms of the same element must always have the same number of _________

• electrons
• neutrons
• isotopes
• protons

Protons and neutrons are located in the center of the atom called the ___

• nucleus

• proton

• isotope

• molecule