Chemistry midterm review - 2

2 or more atoms linked by chemical bonds

• atom

• molecule

• mole

• element

Atoms with the same number of protons but different number of neutrons

• ion

• isotope

• mass number

• atomic number

An atom that has an unequal number of protons and electrons

• ion

• isotope

• mass number

• atomic number

The number of protons + number of neutrons in an atom

• ion

• isotope

• mass number

• atomic number

Which of the following is a heterogeneous mixture?

• oxygen

• carbon dioxide

• chocolate chip cookie

• saltwater

The simplest whole-number ratio of atoms in a compound

• empirical formula

• ionic compound

• molecular compound

• molecular compound

Which of the following is avogadro's number?

• 6.022

• 6.022 x 10²³

• 6.022 x 10

• 6.022 x 10¹⁰

Which of the following equals 0 Kelvin ?

• 273^oC

• -273^oC

• 0^oC

• 0^oF

The reactant that is used up first in a chemical reaction is called the __

• limiting reactant

• excess reactant

• end product

What is the mass of one mole of H₂O?

• 16.00g

• 2.02 g

• 18.02 g

• 20.00g