Exam 1

Question 1

Celsius to kelvin?

Answer 1

C+273

Question 2

Fahrenheit to Celsius?

Answer 2

C=5/9(f-32)

Question 3

What is always true when a substance undergoes a physical change?

Answer 3

Its composition remains the same

Question 4

What is always true when a substance undergoes a chemical change?

Answer 4

A new substance is formed

Question 5

What is the abbreviation and definition of micro?

Answer 5

Abbreviation: u Definition: 10^-6

Question 6

What is the abbreviation and definition of Mega?

Answer 6

Abbreviation: M Definition: 10^6

Question 7

What is the abbreviation and definition for kilo?

Answer 7

Abbreviation: k Definition 10^3

Question 8

What is the abbreviation and definition for centi?

Answer 8

Abbreviation: c
Definition: 10^-2

Question 9

What is the abbreviation and definition for milli?

Answer 9

Abbreviation: m
Definition: 10^-3

Question 10

What is the abbreviation and definition for nano?

Answer 10

Abbreviation: n
Meaning: 10^-9

Question 11

1 kilojoule is how many joules?

Answer 11

1kj=10^3J

Question 12

1cm^3 is how many milliliters?

Answer 12

1cm^3=1mL

Question 13

How many cm are in an inch?

Answer 13

1in=2.54cm

Question 14

How many inches in a foot?

Answer 14

12in=1 foot

Question 15

How to tell if an element is ionic?

Answer 15

If it is a metal and non metal together

Question 16

How to tell if something is polar?

Answer 16

If all the atoms around the central atom are different and there are lone pairs

Question 17

How to tell if something is non polar?

Answer 17

If all the atoms around the central atom is the same and there are no lone pairs

Question 18

How to tell if something is covalent/molecular bond/compound?

Answer 18

Two non metals react

Question 19

Multiplying and dividing sig fig rules

Answer 19

Take the least amount of sig figs for your answer

Question 20

Adding and subtracting sig fig rule?

Answer 20

Least number of decimal places

Question 21

What is the density formula

Answer 21

D=M/V

Question 22

Accurate vs precision

Answer 22

Accurate: how close to true value
Precision: how close each value is to each other

Question 23

What is the prefix mono?

Answer 23

1

Question 24

What is the prefix Di

Answer 24

2

Question 25

What is the prefix tri

Answer 25

3

Question 26

What is the prefix tetra

Answer 26

4

Question 27

What is the prefix penta

Answer 27

5

Question 28

What is the prefix hexa

Answer 28

6

Question 29

What is the prefix hepta

Answer 29

7

Question 30

What is the prefix Octa

Answer 30

8

Question 31

What is the prefix nona

Answer 31

9

Question 32

What is the prefix deca

Answer 32

10

Question 33

What form of radioactivity penetrates matter most?

Answer 33

Gamma rays

Question 34

What form of radioactivity penetrates matter the least?

Answer 34

Alpha particles

Question 35

What is true about isotopes?

Answer 35

-have different masses
-Different numbers of neutrons
-different nuclear symbols
-have different mass numbers

Question 36

What happens to the net effect of emission of a b particle by the nucleus

Answer 36

-protons would increase
-neutrons would decrease
-mass number would be same
-atomic number would be larger than shown