Atom and the Periodic Table

Question 1

The nucleus of an atom has a ____________ charge.

Accepted Answer

positive

Question 2

Oxygen's atomic number is 8 and its average mass is 16.0 amu. How many protons does it have?

Accepted Answer

8

Question 3

In the element diagram, part A represents the

Accepted Answer

atomic number

Question 4

Which particle in an atom is so small it is not considered to have any mass?

Accepted Answer

electron

Question 5

An atom that has 10 protons, 12 neutrons and 10 electrons would have a mass number of ????

Accepted Answer

22

Question 6

What part of an atom is "A"?

Accepted Answer

electron

Question 7

The smallest whole unit of matter is called a/an ________

Accepted Answer

atom

Question 8

Which metal element is a liquid at room temperature?

Accepted Answer

mercury

Question 9

Who did the gold foil experiment?

Accepted Answer

Rutherford

Question 10

What do groups on the periodic table share?

Accepted Answer

similar properties

Question 11

Which of the following is a unit of mass for an atom?

Accepted Answer

U or amu

Question 12

Atoms that gain an electron become what kind of an ion?

Accepted Answer

negatively charged

Question 13

What part is "C"?

Accepted Answer

proton

Question 14

Part of an atom with no electrical charge

Accepted Answer

neutron

Question 15

Who is given credit for developing the periodic table?

Accepted Answer

Dmitri Mendeleev

Question 16

What part is "B"?

Accepted Answer

neutron

Question 17

Which group of elements are sometimes called semiconductors?

Accepted Answer

metalloids

Question 18

In Thomson's plum pudding model, the plums represent the _________________.

Accepted Answer

electrons

Question 19

The most up to date model of an atom is

Accepted Answer

electron cloud model

Question 20

The atomic number tells how many ___________ are in the nucleus of the atom.

Accepted Answer

protons

Question 21

Which element on the periodic table has no neutrons?

Accepted Answer

hydrogen

Question 22

Who named the atom?

Accepted Answer

Democritus

Question 23

The chart that contains all of the known elements is called the

Accepted Answer

periodic table

Question 24

How many electrons can the 2nd orbit hold?

Accepted Answer

8

Question 25

Which element on the periodic table is the lightest of all elements?

Accepted Answer

hydrogen

Question 26

The central region of an atom is called the ____________?

Accepted Answer

nucleus

Question 27

Who discovered the neutrons?

Accepted Answer

Chadwick

Question 28

How many neutrons does Phosphorus have?

Accepted Answer

16

Question 29

Most elements on the periodic table are

Accepted Answer

metals

Question 30

Atoms that have a different number of neutrons than protons are called

Accepted Answer

isotopes

Question 31

In the element diagram, letter D is called

Accepted Answer

atomic mass

Question 32

In the diagram, part C represents

Accepted Answer

element name

Question 33

The sum of the protons and neutrons in the nucleus of an atom

Accepted Answer

mass number

Question 34

What experiment did JJ Thomson perform to discover the electron?

Accepted Answer

Cathode Ray Tube

Question 35

Who discovered the electron?

Accepted Answer

JJ Thomson

Question 36

What charge do protons have?

Accepted Answer

positive

Question 37

What particles are found in the nucleus?

Accepted Answer

protons and neutrons

Question 38

What particle did Ernest Rutherford discover?

Accepted Answer

Proton

Question 39

How many periods are on the periodic table?

Accepted Answer

7

Question 40

On the periodic table, part B refers to

Accepted Answer

chemical symbol

Atom and the Periodic Table

Questions 40

Atom and the Periodic Table

Questions 40