Introduction to Chemistry

Question 1

Why do atoms undergo reactions with other atoms?

Accepted Answer

To fill their valence shell of electrons

Question 2

The atomic mass (mass number) of an element is equal to ______

Accepted Answer

# of neutrons+protons

Question 3

What element is in group 16, period 3

Accepted Answer

Sulfur

Question 4

What is the atomic number of Boron (B)?

Accepted Answer

5

Question 5

Who discovered the nucleus of the atom and that it had a positive charge?

Accepted Answer

Ernest Rutherford

Question 6

A proton has a _______ charge

Accepted Answer

Positive

Question 7

The periodic table has vertical columns called ________

Accepted Answer

Groups/ families

Question 8

Who was the genius that created the periodic table and organized it by atomic mass?

Accepted Answer

Dmitri Mendeleev

Question 9

There can be up to ____ electrons in the 2nd energy shell.

Accepted Answer

8

Question 10

What periodic group is Chlorine (Cl) located in?

Accepted Answer

Halogens

Question 11

Alkali Metals are known to be the least reactive metals on the periodic table.

Accepted Answer

False

Question 12

In which of the following would you find an Alkali Metal....

Accepted Answer

Battery, Banana

Question 13

What is the basic building block of an element?

Accepted Answer

Atom

Question 14

Reactive means ________

Accepted Answer

Responds to other elements

Question 15

How many valence electrons does Iodine have?

Accepted Answer

7

Question 16

The transition metals are in which groups/families

Accepted Answer

3-12

Question 17

An isotope is an atom that contains a different number of ________

Accepted Answer

neutrons

Question 18

True/False - The Noble Gases are very reactive.

Accepted Answer

False

Question 19

A collection of elements on the periodic table with similar properties are....

Accepted Answer

Families

Question 20

Periods are the ______ rows in a periodic table.

Accepted Answer

Horizontal

Question 21

True or False: Metals are more likely to lose electrons compared to nonmetals in reactions.

Accepted Answer

True

Question 22

Sodium catches fire when it hits water. What is happening?

Accepted Answer

A reaction

Question 23

The _____ _______ is the amount of protons or electrons in an atom.

Accepted Answer

Atomic Number

Question 24

A Magnesium atom will likely take on a _____ charge when it becomes an ion.

Accepted Answer

2+

Question 25

True/False - Electrons are in the nucleus.

Accepted Answer

False

Introduction to Chemistry

Questions 25

Introduction to Chemistry

Questions 25