Chapter 2

Question 1

name all the subatomic particles and their charges

Answer 1

electron (negative)
proton (positive)
neutron (neutral)

Question 2

what symbol represents the atomic number

Answer 2

Z

Question 3

what’s the nucleus characteristic

Answer 3

extremely dense, represents almost all of the atom’s mass

Question 4

whats an atom’s principal composition

density wise

Answer 4

nothing everything condensed in the nucleus.

Question 5

define isotopes

Answer 5

atoms with the same nb of p+ but different number of neutrons
possess identical chemical properties

Question 6

Why do isotopes have the same chemical properties as the parent atom

Answer 6

chemistry depends on the electron not nucleus

Question 7

true or false
isotopes are always considered when calculating the atomic mass

Answer 7

true

Question 8

what does the symbol A represent

Answer 8

the atomic mass

Question 9

define a covalent bond

Answer 9

sharing of electron

Question 10

whats the difference between a compound and a molecule

Answer 10

compound is a molecule with different atoms
molecules is just atoms, they’re not necessarily different

Question 11

define ionic bonds

Answer 11

formed by the attractions between oppositely charged ions

Question 12

name the main groups

Answer 12

alkali metals
alkaline earth metals
halogens
noble gases

Question 13

name the diatomic elements

Answer 13

H, N, O, F, Cl, Br, I

Question 14

When do we use prefixes when naming compounds

Answer 14

ONLY if covalent compounds
ex: CO= carbon monoxide

Question 15

why do atoms lose or gain e-

Answer 15

to gain stability( be like closest noble gas)

Question 16

Define the types of ions with their charges

Answer 16

anions have negative charges(gain e-)
cations have positive charges (lose e-)

Question 17

How to name type 1 binary ionic compounds

Answer 17

monoatomic cation takes its name from the element
monoatomic anion takes its name from the root of element + ide
ex: MgBr2= Magnesium bromide

Question 18

how to name type 2 binary ionic compounds

Answer 18

names remain the same as type 1 but the charge of the transition metal must be added
ex: PbO2= Lead (IV) oxide

Question 19

True or False
We add prefixes in polyatomic ions

Answer 19

False

Question 20

Whats the charge of Ag, Zn and Cd

Answer 20

+1, +2 and +2

Question 21

What’s the charge of a peroxide and superoxide

Answer 21

-1 and -1/2

Question 22

How to name covalent compounds

Answer 22

use prefixes used to indicate nb of atoms of each element in chemical name

Question 23

True or False
We never add mono for the first element

Answer 23

true

Question 24

How to name acids

Answer 24

if an anion doesn’t have oxygen the prefix hydro- and the suffix -ic
if anion has oxygen then only add suffix -ic if root name ends in ate and suffix -ous if root name ends in ite.

Question 25

in what order do we name multiple cations in molecule

Answer 25

in alphabetical order

Question 26

how to name hydrates

Answer 26

specify nb of water molecule and rest of molecule like normal

Question 27

how do you call molecules with no water attached to it

Answer 27

anhydrous