Atoms and bonding

Electrons involved in chemical bonding.

• valence

• ionic

• covalent

• metallic

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Each dot on a dot diagram represents one

• proton

• atomic mass unit

• energy level

• valence electron

Tags

NGSS.HS-PS1-1

Which noble gas is an exception to the rule of 8 valence electrons creating chemical stability?

• helium

• hydrogen

• neon

• radon

Tags

NGSS.HS-PS1-1

What is the charge on a Hydrogen ion?

• +1

• 1

• 2

• -2

Tags

NGSS.HS-PS1-1

How many valence electrons does calcium have?

• 2

• 4

• 6

• 7

Tags

NGSS.HS-PS1-1

When an atom gains electrons, it becomes a

• positive ion

• negative ion

• neutral ion

• neutral atom

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Magnesium bromide is an ionic compound with the chemical formula MgBr₂. What does the "2" tell you?

• There are 2 bromide ions for every magnesium ion

• Bromide has a 2- charge

• Bromide has a 2+ charge

• There are 2 magnesium ions to every bromide ion

In the chemical formula for an ionic compound, which item is written first?

• positive ion

• negative ion

• subscript

• atomic number

Which is the correct name for CaBr₂?

• Calcium Bromine

• Bromine Calcium

• Calcium Bromide

• Carbon and Bromine

Tags

NGSS.HS-PS1-1

What two types of atoms make a covalent bond?

• 2 Nonmetals

• 1 Nonmetal and 1 Metal

• 2 Metals

• 2 Noble Gases