section 2

Question 1

if an atom contains 3 protons, 4 neutrons, and 3 electrons, its mass number is…

Answer 1

7

Question 2

if an atom contains 11 protons and 12 neutrons, it’s atomic number is…

Answer 2

11

Question 3

what makes up a molecule of water

Answer 3

two atoms of hydrogen and one atom of oxygen

Question 4

a covalent bond is formed as the result of..

Answer 4

sharing protons

Question 5

water molecules are polar, with the..

Answer 5

oxygen side being slightly negative and the hydrogen side being slightly positive

Question 6

if you stir salt into boiling water, you produce a…

Answer 6

mixture called a solution

Question 7

a substance with a pH of 6 is called…

Answer 7

an acid

Question 8

solutions that have more OH- than H+ ions are…

Answer 8

bases

Question 9

carbon-12 is the most common isotope of carbon. it has 6 protons, 6 neutrons, and 6 electrons. of its 6 electrons, 4 are valence electrons. how many covalent bonds can a carbon form?

Answer 9

4

Question 10

of the three subatomic particles, ________ are most involved in forming chemical bonds

Answer 10

electrons

Question 11

a water molecule is polar because there is an uneven distribution of ________ between the oxygen and the hydrogen atoms

Answer 11

electrons/ charges