Chemistry Ch. 3 Review

Question 1

What is the positive particle found in an atom's nucleus called?

Accepted Answer

Protons

Question 2

Which scientist's model suggested that electrons orbit the nucleus like Earth around the sun?

Accepted Answer

Bohr

Question 3

Which element is found in group 7 and period 4?

Accepted Answer

Manganese

Question 4

Which scientist's model first contained negatively charged particles called electrons?

Accepted Answer

Thomson

Question 5

The number of protons in an atom is determined by its...

Accepted Answer

Atomic Number

Question 6

Which group of metals is the most reactive?

Accepted Answer

Alkalai Metals

Question 7

Which of the following is NOT a property of non metals?

Accepted Answer

Ductile

Question 8

Which scientist organized the first 63 elements into a table by increasing atomic mass?

Accepted Answer

Dmitri Medeleev

Question 9

The atomic mass number is equal to an atoms....

Accepted Answer

Protons + Neutrons

Question 10

How many neutrons does the noble gas Argon have?

Accepted Answer

22

Question 11

More than half the known elements belong to which category of elements?

Accepted Answer

Metals

Question 12

Which group of elements show both properties of metals and non metals?

Accepted Answer

Metalloids

Question 13

Which of the following is NOT a property of metals?

Accepted Answer

Brittle

Question 14

What did Rutherford's experiment with gold foil prove about the atom?

Accepted Answer

There is a positive central nucleus

Question 15

All atoms have equal numbers of which types of particles?

Accepted Answer

Protons and Electrons

Question 16

Which property of metals means it can be hammered or rolled into flat sheets and other shapes?

Accepted Answer

Malleable

Question 17

What term refers to the smallest possible particle of an element?

Accepted Answer

Atoms

Question 18

The only non metal that is commonly found in liquid phase is...

Accepted Answer

Bromine

Question 19

Atoms with the same number of protons but different numbers of neutrons are called...

Accepted Answer

Isotopes

Question 20

Flourine, Chlorine, Bromine, and Iodine are all elements belonging to which family?

Accepted Answer

Halogens

Questions 20