Chemistry 10th Grade (updated occasionally)

Question 1

Lithium in abbrieviated form would look like:

Accepted Answer

[He]2s1

Question 2

How do you calculate weighted average?

Accepted Answer

W = M1 * P1 + M2 * P2 + M3 * P3 . . .

Question 3

In the configuration of Pottasium (first row), what would it end with?

Accepted Answer

s1

Question 4

1.2 x 103 x 3.0 x 105

Accepted Answer

3.6 x 10 8

Question 5

Are non-metals ductile?

Accepted Answer

No

Question 6

as americans, we believe in kilometer

Accepted Answer

False

Question 7

Micro is 10-3

Accepted Answer

False

Question 8

What is an example heterogeneous mixture?

Accepted Answer

salad

Question 9

Gas is compressible.

Accepted Answer

True

Question 10

What letter represents Atomic Mass Number?

Accepted Answer

Z

Question 11

0.003647500

Accepted Answer

7 S.F.

Question 12

(choose the correct answer)

Accepted Answer

Proton 1 charge, 1 mass Neutron 0 charge, 1 mass Electron -1 charge, 1/2000

Question 13

What can measure the amount of an isotope in nature?

Accepted Answer

percent abundance

Question 14

What is an ion?

Accepted Answer

Any element that has a non-zero charge

Question 15

What is the difference between a theory, law, and postulate?

Accepted Answer

Theory has counterclaims, Law is strongest, Postulate is the weakest.

Question 16

NaCl is a covalent bond.

Accepted Answer

False

Question 17

Salt (Sodium Chloride) is an element.

Accepted Answer

False

Question 18

Group 12 has what classification?

Accepted Answer

Transition Metal

Question 19

Which metalloid is most commonly used in devices. think fast you only get 10 seconds and its written with symbols lol

Accepted Answer

Si

Question 20

What is energy?

Accepted Answer

Anything that can do work OR produce heat.

Question 21

Did you study for chemistry?

Accepted Answer

Yes

Question 22

How likely are you to fail?

Accepted Answer

I WILL NOT FAIL

Question 23

Which of these is NOT a step of the Scientific Method?

Accepted Answer

Explanation

Question 24

What is Chemistry?

Accepted Answer

The study of matter AND the changes to it

Question 25

Who made the plum pudding (cookie)

Accepted Answer

JJ Thompson

Question 26

Potassium, Lithium, and Sodium are all flammable.

Accepted Answer

True

Question 27

What is the SI unit for length?

Accepted Answer

Meter

Question 28

The 1st step in mass spectrometry is heater vaporization + electron beaming.

Accepted Answer

True

Question 29

which is NOT a rule that applies to atoms and their electrons

Accepted Answer

electron diagram

Question 30

What is mass and what is matter (according to the Chemisty Slides)? Choose EITHER one.

Accepted Answer

Mass is the amount of matter in an object., Matter is anything that has mass and volume.

Question 31

Lithium +5 has 3 protons (read it at least 3 times)

Accepted Answer

False

Question 32

What is used to measure accuracy and precision?

Accepted Answer

Accuracy uses percent error, and precision uses standard deviation

Question 33

Qualitative measures are based on numbers/data.

Accepted Answer

False

Question 34

Corrosion is a chemical change.

Accepted Answer

True

Question 35

What can you do with energy (what)

Accepted Answer

None of THeSE (YOU CANT)

Question 36

what is the ratio inside a natural Magnesium25 sample?

Accepted Answer

Does not exist

Question 37

How many periods and how many groups are there?

Accepted Answer

7 periods 18 groups

Question 38

radon -1 has how many protons (look at br farhans periodic table if you dont have yours right now)

Accepted Answer

86

Question 39

WHO IS DEMOCRITUS (you have time to google it)

Accepted Answer

The guy that thought about atoms (Atoms ar ento infiniely divisible)

Question 40

Dimitri Mendeleev was the first chemist to start charting elements through the periodic table.

Accepted Answer

False

Question 41

Which one of these is an angular momentum quantum number (also known as an energy sublevel)

Accepted Answer

f

Question 42

Homogeneous mixtures are not uniform throughout the substance,

Accepted Answer

False

Question 43

which group has the most stable configuration?

Accepted Answer

Noble Gases

Chemistry 10th Grade (updated occasionally)

Questions 43

Chemistry 10th Grade (updated occasionally)

Questions 43