Atoms & Periodic Table Review (#2)

Question 1

How many groups are there on the periodic table?

Accepted Answer

18

Question 2

Most of the mass of an atom is found:

Accepted Answer

in the nucleus

Question 3

An element can be identified by the number of ____________in the nucleus of its atoms

Accepted Answer

protons, electrons

Question 4

How many neutrons does an average atom of hydrogen have?

Accepted Answer

0

Question 5

What is the atomic number?

Accepted Answer

The number of protons in an element

Question 6

Phosphorus-33 (atomic number 15) contains:

Accepted Answer

18 neutrons

Question 7

Diagram: which is a neutron?

Accepted Answer

B

Question 8

The nucleus of an atom has all of the following characteristics except that it

Accepted Answer

contains all the atom's volume

Question 9

The electrons are held in their orbit around the nucleus because of the attraction from the

Accepted Answer

protons (opposites attract)

Question 10

When there are the same number of protons and electrons in an atom, that atom is ...

Accepted Answer

neutral

Question 11

Isotopes are atoms of the same element that have a different

Accepted Answer

number of neutrons

Question 12

How many protons are in an atom of Carbon?

Accepted Answer

6

Question 13

How many periods are there on the periodic table?

Accepted Answer

7

Question 14

Which group on the periodic table is most reactive?

Accepted Answer

Group 1

Question 15

Most of the volume of an atom is occupied by the:

Accepted Answer

electron cloud

Question 16

What parts of the atom make up most of the mass?

Accepted Answer

protons and neutrons

Question 17

Diagram: Which is an electron

Accepted Answer

A

Question 18

Which group on the periodic table is most stable (non-reactive)?

Accepted Answer

Group 18

Question 19

How many electrons does a neutral carbon atom have?

Accepted Answer

6

Question 20

The average atomic mass of an element is the average of the atomic masses of its:

Accepted Answer

naturally occurring isotopes

Question 21

Most of the atom is empty space

Accepted Answer

True

Question 22

The total number of protons and neutrons in the nucleus of an atom is its

Accepted Answer

atomic mass

Question 23

What is the atomic number of an element with 12 protons, 13 neutrons, 12 electrons?

Accepted Answer

12

Question 24

All atoms of the same element have the same...

Accepted Answer

number of protons

Question 25

Diagram: Which are protons?

Accepted Answer

B.

Atoms & Periodic Table Review (#2)

Questions 25

Atoms & Periodic Table Review (#2)

Questions 25