2018 Physical Science Chemistry Concepts Exam Review

Jack has a rock. The rock has a mass of 14g and a volume of 2cm³. What is the density of the rock?

• 7 mL
• 7 g/cm³
• 28 g/cm³
• 1/7 g/cm³

Tags

CCSS.7.RP.A.3

Veal finds a gold colored rock in a river.  It has a mass of 9.65 grams and a volume of 0.5 cm3.  What is the density of the rock?

• 10.15 g/cm3
• 19.3 g/cm3
• 9.15 g/cm3
• 4.825 g/cm3

_P₄+_O₂ →  _P₂O₃

• 3 P₄+1 O₂ → 2 P₂O₃
• 1 P₄+1 O₂ → 2 P₂O₃
• 1 P₄+ 3 O₂ → 2 P₂O₃
• 1 P₄+ 2 O₂ → 3 P₂O₃

Tags

NGSS.MS-PS1-5

_K + _Cl₂ →_KCl

• 2 K + 16 Cl₂ → 8 KCl
• 2 K + 1 Cl₂ → 2 KCl
• 3 K + 4 Cl₂ → 3 KCl
• 1 K + 1 Cl₂ →1 KCl

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

_NaF + _Br₂ →_NaBr + _F₂

• 1NaF + 2 Br₂ →1 NaBr + 2 F₂
• 2NaF + 2 Br₂ → 2 NaBr + 2 F₂
• 2 NaF + 3 Br₂ → 1 NaBr + 2 F₂
• 2 NaF + 1 Br₂ → 2 NaBr + 1 F₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Covalent compounds

• Share electrons
• transfer electrons
• contain a sea of electrons
• conduct electricity

Tags

NGSS.MS-PS1-1

What two types of atoms make a covalent bond?

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

Tags

NGSS.MS-PS1-1

What elements generally make an ionic bond?

• metal and nonmetal
• 2 or more nonmetals
• metal
• none of the above

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is a valence electron?

• an electron that is found in the outermost shell of an atom. 
• an electron found in the innermost shell of an atom.
• an electron found in the middle shell.

Tags

NGSS.MS-PS1-1

What is the number of valence electrons for Oxygen?

• 8
• 6
• 2
• 1

Tags

NGSS.MS-PS1-1