Basic Chem Review

What makes a molecule polar?

• Equal sharing of valence electrons
• Unequal sharing of valence electrons
• Stealing of electrons
• Giving of electrons

Covalently bonded molecules are made of atoms that

• share electrons

• move their electrons to the outermost shell/orbital

• move their electrons to the nucleus of the atom
• give electrons to and accept electrons from each other

Ionically bonded compounds are made of atoms that 

• share electrons
• move their electrons to the outermost shell/orbital

• move their electrons to the nucleus of the atom
• give electrons to and accept electrons from each other

Tags

NGSS.HS-PS1-3

Water molecules require a lot of energy to separate one from the others.  This gives water a high

• density
• polarity
• capillary action

• specific heat

Tags

NGSS.HS-PS1-3

If an atom has an equal amount of Protons and electrons, what will its charge be?

• Positive
• Negative
• Neutral
• Infinite

Which of the following is the correct pH scale?

• 0 to 7
• 0 to 14
• 7 to 14
• 0-100

A substance has a pH of 2. This substance

• Acidic

• Basic

• Neutral

• Alkaline

Changing this changes the element name

• protons
• neutrons
• electrons

Tags

NGSS.HS-PS1-1

Changing this changes the weight of an atom

• protons
• neutrons
• electrons
• protons and neutrons

Tags

NGSS.MS-PS1-5

Changing this causes ions to form

• electrons
• protons
• neutrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2