Chemistry Unit 1 Review

The sub-atomic particle with a positive charge:

• Electron

• Proton

• Neutron

• Nucleus

What is the center of the atom, that also contains all of an atom's mass?

• Proton
• Neutron
• Electron
• Nucleus

Where are electrons located? (Up to 7 of increasing energy.)

• Nucleus
• Electron Shells
• Valence Shell
• Periodic Table of Elements

An atom has an atomic number of 5, and an atomic mass of 11. How many neutrons does this atom have?

• 4
• 5
• 6
• 7

Tags

NGSS.MS-PS1-1

If an atom has 8 protons, how many electrons does it have?

• 4
• 8
• 16
• 2

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

Tags

NGSS.MS-PS1-1

The atomic number of an elements is the total number of which particles in the nucleus?

• Neutrons
• Protons
• Electrons
• Protons and electrons

In a neutral atom the number of protons equals the number of neutrons

• True

• False

Which element has 14 protons?

• Nitrogen

• Silicon

• Aluminum

• Sulfur

The average atomic mass rhenium, Re, is 186.21 amu. If 37.1% of rhenium has mass# = 185, what is the other stable isotope?

• Rhenium-183
• Rhenium-181
• Rhenium-187
• Rhenium-189

Tags

NGSS.HS-PS1-8