Chemistry exam 1

Question 1

What elements are in the first row of the periodic chart?

Answer 1

Hydrogen H, and Helium He

Question 2

What elements are in the second row?

Answer 2

Lithium Li, Beryllium Be, Boron B, Carbon C, Nitrogen N, Oxygen O, Fluorine F, and Neon Ne

Question 3

What the alkaline metals?

Answer 3

Lithium Li, Sodium Na, and Potassium K
The first column of the periodic chart excluding Hydrogen H

Question 4

What are the alkaline- earth metals?

Answer 4

Beryllium Be, Magnesium Mg, and Calcium Ca
The second column of the periodic chart.

Question 5

What are the halogens?

Answer 5

Fluorine F, Chloride Cl, Bromine Br, and Iodine
The seventh column of the periodic chart

Question 6

What are the noble gases?

Answer 6

Helium He, and Neon Ne
The 8th column on the periodic table

Question 7

What is the mass and charge of a proton?

Answer 7

Charge: +1.6 x 10^19 C
Mass: 1.67262 × 10^−27 kg

Question 8

What is the mass and charge of a neutron?

Answer 8

Charge: 0 C
Mass: the same as a proton 1.67262 × 10^−27 kg

Question 9

What is the mass and charge of an electron?

Answer 9

Charge: -1.6 x 10^19 C
Mass: 1,836 times smaller than a proton/ neutron it is to small to comprehend

Question 10

What are all of the stable isotopes of Hydrogen H?

Answer 10

There are 2 types of hydrogen isotopes 2H and 3H. 2H has 2 nucleons (1p +1n= 2), it is also known as deuterium (D). 3H has 3 nucleons, (1p+ 2n= 3), it is also known as tritium (T).

Question 11

What are all the stable isotopes of He?

Answer 11

There are 2 stable isotopes of He, they are 3He and 4He. 3He has 1 neutron and 2 protons. 4He has 2 neutrons and 2 protons.