Chapter 2: Atoms, Molecules, Ions

What is the chemical formula of chromium(VI) sulfate?

• CrSO_4

• Cr(SO₄)₃

• Cr₄(SO₄)₃

• Cr₆SO₄

Tags

NGSS.HS-PS1-2

What is the chemical formula for ammonium hydroxide?

• NH₄OH

• N₃OH

• NH₃(OH)₃

• NH(OH)₃

What is the chemical formula of cobalt (II) hydroxide?

• Co(OH)₂

• Co₂(OH)

• CoH₂

• Co₂H₂O

What is the IUPAC name of the compound whose formula is (NH₄)₃PO₄ ?

• ammonium phosphate

• triammonium monophosphate

• triammonium phosphate

• ammonium phosphide

Tags

NGSS.MS-PS1-1

Sodium has an atomic number of 11, how many protons does this atom have?

• 22
• 11
• 12
• 2

Tags

NGSS.MS-PS1-1

Where is the proton located?

• In the very dense nucleus

• Floating around in the negative electron cloud

• In the loose nucleus

• In the positive electron cloud

Tags

NGSS.HS-PS1-8

The following element key shows how many protons?

• 16
• 15.999
• Oxygen
• 8

Tags

NGSS.MS-PS1-1

What is at the center of every atom?

• An electron

• A compound

• A molecule

• A nucleus

Tags

NGSS.HS-PS1-8

Which two particles make up the nucleus of an atom?

• Protons and Electrons
• Protons and Neutrons
• Molecules and Compounds
• Neutrons and Electrons

Tags

NGSS.MS-PS1-1

Which statement correctly describes an electron in an atom?

• Electrons stay inside the nucleus and carry a neutral charge.

• Electrons circle the nucleus and have a positive charge.

• Electrons move around the nucleus and have a negative charge.

• Electrons stay inside the nucleus and have a negative charge.