Atoms and the Periodic Table

Question 1

How many energy levels (shells) does a neutral potassium atom have?

Accepted Answer

4

Question 2

Who developed the first periodic table where elements are arranged my atomic mass?

Accepted Answer

Mendeleev

Question 3

How many neutrons in oxygen-18?

Accepted Answer

10

Question 4

Most elements in the periodic table are

Accepted Answer

Metals

Question 5

The atomic number represents

Accepted Answer

The number of protons in an atom.

Question 6

Alkali Metals have ___ valence electron(s).

Accepted Answer

1

Question 7

What is the atomic number for Sodium?

Accepted Answer

11

Question 8

Which of the following are considered nonreactive elements?

Accepted Answer

Noble Gases

Question 9

The overall charge of an atomic nucleus is

Accepted Answer

Positive

Question 10

The horizontal rows on the periodic table are called:

Accepted Answer

Periods

Question 11

Atoms with an equal number of protons and electrons are

Accepted Answer

Neutral

Question 12

The scientist that discovered the atomic nucleus.

Accepted Answer

Rutherford

Question 13

37Cl (chlorine-37)

Accepted Answer

has 20 neutrons

Question 14

The elements in group 15 have ____ valence electrons.

Accepted Answer

5

Question 15

In which period is Iron (Fe) located?

Accepted Answer

4

Question 16

Which of the following elements is in the halogen group?

Accepted Answer

Iodine

Question 17

How many valence electrons does a neutral chlorine atom have?

Accepted Answer

7

Question 18

Which of the following subatomic particle(s) make(s) up the mass of the atom?

Accepted Answer

Protons and neutrons

Question 19

Which of the following is NOT a transition metal?

Accepted Answer

lead

Question 20

The first person to establish the idea of atoms was

Accepted Answer

Democritus

Question 21

Who discovered the neutron?

Accepted Answer

James Chadwick

Question 22

Carbon-12 and Carbon-14....

Accepted Answer

are isotopes with the same number of protons.

Question 23

How many electrons can fit in the 2nd energy level in the Bohr Model?

Accepted Answer

8

Question 24

The most reactive nonmetals are in group

Accepted Answer

17

Atoms and the Periodic Table

Questions 24

Atoms and the Periodic Table

Questions 24