Science Midterm Test

Question 1

How many valence electrons are in the neutral atom Na

Answer 1

one

Question 2

when naming a compound

Answer 2

the non-metal gets a -ide ending

Question 3

a polyatomic ion

Answer 3

is made of more than one elemant

Question 4

In a covalent compound, how do atoms complete their outer electron shells?

Answer 4

sharing electrons

Question 5

why does log burning seem to disobey the law of conservation of mass

Answer 5

the gasses escaped cant be measuerd

Question 6

what gas is given off when zinc reacts with hydrochloric acid

Answer 6

hydrogen gas

Question 7

neutralization reactions occur between

Answer 7

an acid and a base

Question 8

which type of bond creates molecules

Answer 8

covalent

Question 9

a double displacement occurs when

Answer 9

two-electron are swapped between ions

Question 10

prefixes are only used for compounds containing

Answer 10

a non-metal and a metal

Question 11

when forming ionic compound the overall charge

Answer 11

must be 0

Question 12

what are two categories that all matter can be divided by into based on compitistion

Answer 12

mixtures and pure substances

Question 13

whats a example pure substance

Answer 13

air

Question 14

what is a relative nuber of subatomic particles is always true

Answer 14

the number of neutrons is equal to the atomic mass of an atom

Question 15

in reactiions with non-metals and metals, metals tend to

Answer 15

lose electrons to become positivly charged

Question 16

what is a prefix

Answer 16

non-metal and non-metal

Question 17

light

Answer 17

enters your eyes from all objects you see

Question 18

light year

Answer 18

distance light travels in one year

Question 19

electromagnetic spectrom

Answer 19

the range of frequency, of electrons radiation

Question 20

additive colour theory of light

Answer 20

white light is composed of different colours of light. it can only be produced by red, green, blue

Question 21

subtractive colour theory of light

Answer 21

magenta,yellow,cyan

Question 22

phosphorescence

Answer 22

absorb light energy and realise visual light of lower

Question 23

chemiluminescence

Answer 23

almost no heat is [produced as a resukt of this type of reaction

Question 24

bioluminescence

Answer 24

when chemiluminescence occor in living organisms

Question 25

rectilinear propagation

Answer 25

light always travels in a straight line

Question 26

transparent

Answer 26

allows nearly all rays to pass right threw it

Question 27

translucent

Answer 27

transmits and scatters all the rays

Question 28

opaque

Answer 28

absorbs and scatters all the rays

Question 29

Any wave travelling a “c” is part of the EM spectrum. what distinguishes different wave members family is the size of their…

Answer 29

wave

Question 30

Light is a ….. and ….

Answer 30

a particle and a wave

Question 31

Ray diagrams show how light moves from the …..

Answer 31

object to the eye

Question 32

when an object looks blue, the object absorbed all light except for …

Answer 32

blue

Question 33

1.

Answer 33

radio

Question 34

2.

Answer 34

microwave

Question 35

3.

Answer 35

infared

Question 36

4.

Answer 36

visible light

Question 37

5.

Answer 37

ultraviolet

Question 38

6.

Answer 38

x-ray

Question 39

7.

Answer 39

gamma ray

Question 40

8.

Answer 40

longer wave legnth

Question 41

9.

Answer 41

loswer frequancy

Question 42

10.

Answer 42

lower energy

Question 43

11.

Answer 43

shorter wavelength

Question 44

12.

Answer 44

higher frequancy

Question 45

13,

Answer 45

higher energy