R4 PS Chemistry Sem Unit 1-2

Question 1

Helium has _____ protons.

Accepted Answer

2

Question 2

A proton has approximately the same mass as

Accepted Answer

a neutron

Question 3

How many electrons does this element have?

Accepted Answer

10

Question 4

What pH is the most basic?

Accepted Answer

13

Question 5

What has a definite size and not a definite shape?

Accepted Answer

liquid

Question 6

Evaporation occurs when:

Accepted Answer

a liquid changes to a gas

Question 7

How many neutrons does this element have?

Accepted Answer

7

Question 8

What chemical property is shampooing your hair?

Accepted Answer

reacting

Question 9

The Hypothesis must be:

Accepted Answer

all of these

Question 10

What is combustion?

Accepted Answer

Explosions or burning

Question 11

In Charles’s Law, Temperature and Volume are:

Accepted Answer

directly related

Question 12

What is the mass number of an atom, which contains 28 protons, 28 electrons, and 34 neutrons?

Accepted Answer

62

Question 13

What pH is the most acidic?

Accepted Answer

1

Question 14

What is the chemical state of matter?

Accepted Answer

gas

Question 15

Density is the ratio of:

Accepted Answer

mass/volume

Question 16

What is the name of the element?

Accepted Answer

oxygen

Question 17

What is the equation for density?

Accepted Answer

d = m/v

Question 18

Which has the least energetic molecules?

Accepted Answer

solid

Question 19

The identity of an element is determined by its number of

Accepted Answer

protons

Question 20

How many protons does it have?

Accepted Answer

8

Question 21

Which group in the Periodic Table contains elements that are all gases?

Accepted Answer

18

Question 22

Which of these is a metalloid?

Accepted Answer

Silicon

Question 23

If the pH of a substance is 5, what is the concentration of H+ ions?

Accepted Answer

10-5

Question 24

What is the electron configuration?

Accepted Answer

1s2, 2s2, 2p6

Question 25

The electron configuration of Sb ends in...

Accepted Answer

5p3

Question 26

The electron configuration for Zr is...

Accepted Answer

[Kr] 4d2 5s2

Question 27

What is sublimation?

Accepted Answer

change of state to a solid to gas not going to a liquid

Question 28

What type of change is breaking glass?

Accepted Answer

physical

Question 29

What physical property is aluminum foil?

Accepted Answer

malleability

Question 30

List the phases of water in order, from the slowest movement to fastest movement.

Accepted Answer

solid-liquid-gas

Question 31

tensile strength =

Accepted Answer

force to break when stretched

Question 32

what is a Independent variable

Accepted Answer

is the variable that is deliberately changed by the scientist.

Question 33

What is malleability?

Accepted Answer

How easily a solid can be pounded into thin sheets

Question 34

dependent variable is what

Accepted Answer

change that occurs in response to the independent variable

Question 35

Boyles Law

Accepted Answer

pressure is inversely proportional to volume

Question 36

What is the location (group and period).

Accepted Answer

16, 2

Question 37

What is the loop electron configuration for Copper?

Accepted Answer

2, 8 , 17, 2

Question 38

In Boyle’s Law, Pressure and Volume are:

Accepted Answer

inversely related

Question 39

Atoms become ions by ___

Accepted Answer

gaining or losing electrons

Question 40

Atoms with the same atomic number but different atomic mass are called:

Accepted Answer

isotopes

R4 PS Chemistry Sem Unit 1-2

Questions 40

R4 PS Chemistry Sem Unit 1-2

Questions 40