Review

Fill in the blanks with coefficient:

PCl₅+_ H₂O→_ HCl+H₃PO₄

• 4, 5

• 1, 6

• 3, 8

• 2,2

Which side of a chemical equation is the product side?

• Left (before the yields sign)
• Right (after the yields sign)

What is a coefficient?

• The small number on the right of the chemical symbol.
• The large number to the left of a formula.

Tags

NGSS.MS-PS1-5

Balance this equation
_Zn+_HCl-->_ZnCl₂ +_H₂

• 1,1,2,1
• 1,1,1,2
• 1,2,1,1
• 2,1,1,1

Tags

NGSS.HS-PS1-7

What are ionic bonds?

• valence electrons transferred between atoms
• Inner most electrons transferred between atoms

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Why do ionic bonds form?

• so the number of protons equals the number of electrons
• to fill the outermost energy level
• so an atom can become unstable

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

An electron has what kind of charge?

• no charge
• positive 
• negative
• it depends

Tags

NGSS.HS-PS2-4

a proton has what charge?

• positive
• negative
• no charge
• it depends

What two types of atoms make a covalent bond?

• 2 Nonmetals
• 1 Nonmetal and 1 Metal
• 2 Metals
• 2 Noble Gases

Tags

NGSS.HS-PS1-1

Which of the following is NOT formed by a covalent bond?

• K₂S
• H₂O
• I₂
• CO₂

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2