Chemistry

Question 1

study of composition,structure and properties of matter and the changes they undergo

Answer 1

chemistry

Question 2

state of matter

Answer 2

solid,liquid,gas,plasma,bose-einstein condensate

Question 3

building blocks of matter

Answer 3

atom
molecule
element
compound

Question 4

is anything that occupies space (volume) and has mass

Answer 4

matter

Question 5

atom may gain or lose electrons to form electrically charged species called?

Answer 5

ions

Question 6

the smallest unit of an element

Answer 6

molecule

Question 7

are attractive forces that holds atom together in compound

Answer 7

chemical bonds

Question 8

result from the attraction of nuclei for electrons

Answer 8

bond

Question 9

3 types of chemical bonds

Answer 9

metallic bonds
ionic bonds
covalent bonds

Question 10

have the same electronegativity

Answer 10

nonpolar covalent Bonds

Question 11

has two different electronegativity values

Answer 11

polar covalent bonds

Question 12

simplest ratio

Answer 12

formula unit

Question 13

the bonding between metals must account
for the typical physical properties associated with metals:

Answer 13

metallic bonds

Question 14

• formed by the transfer of one or more electrons from
  one atom to another

Answer 14

ionic bonds

Question 15

Bonds between 2 or more nonmetals
- formed when two nuclei share
electrons, rather than transfer them from
one atom to another.

Answer 15

covalennts bonds

Question 16

charged atom

Answer 16

monoatomic

Question 17

charged group of atoms

Answer 17

POLYATOMIC ION

Question 18

The number charge (including zero) assigned to an atom is called

Answer 18

oxidation number

Question 19

transfer of electrons

Answer 19

ionic bond

Question 20

sharing of electrons

Answer 20

covalent bond

Question 21

overlap of orbitals

Answer 21

metallic bond

Question 21

can be determined from
an atom’s electron configuration and the
position of elements in the periodic table

Answer 21

valence electron

Question 22

Electrons in the outermost energy level of an atom are known as

Answer 22

valence electrons

Question 23

Valence comes
from the Latin word

Answer 23

valentia means ‘‘capacity’’

Question 24

represent the valence electrons in his
teaching of chemical bonding.

Answer 24

lewis dot

Question 25

Useful in explaining the chemical bonding in molecules
or ions.

Answer 25

lewis dot structure

Question 26

Generally each atom needs

Answer 26

8 ve

Question 27

Generally each atom needs eight
electrons in its valence shell (except

Answer 27

hyrogen 2
boron 6

Question 28

have the most unpaired
electrons.

Answer 28

central atoms

Question 29

have the fewest unpaired
electrons.

Answer 29

terminal atoms

Question 30

1.7 or greater

Answer 30

ionic

Question 31

less than 1.7

Answer 31

covalent

Question 32

0-0.3

Answer 32

non polar covalent

Question 33

0.4 - 1.6

Answer 33

polar covalent

Question 34

greater than or equal to 1.7

Answer 34

ionic

Question 35

gain electron

Answer 35

cation

Question 36

lose electron

Answer 36

anion