Prull: Practice for Chapter #1 Test: Periodic Table

Question 1

If an atoms LOST an electron, it becomes ________________________________.

Accepted Answer

positive

Question 2

What are the elements that usually do not form compounds?

Accepted Answer

noble gases

Question 3

If there was a chemical formula Nacl2, what does the "2" tell you?

Accepted Answer

there are 2 Cl atoms

Question 4

A shorter way to show a chemical reaction is to use symbols. This is known as _______________.

Accepted Answer

a chem;ical equation

Question 5

If a substance is malleable, this means it can _____________________.

Accepted Answer

hammered out into a flat sheet

Question 6

If a chemical bond breaks and forms another, it is ______________________.

Accepted Answer

a chemical change

Question 7

Elements are made of smaller particles called _____________________________.

Accepted Answer

atoms

Question 8

Elements that are usually gas at room temperature are likely to be ______________.

Accepted Answer

non metals

Question 9

Name the noble gas.

Accepted Answer

krypton

Question 10

Where are the most reactive metals found on the periodic table?

Accepted Answer

Group 1

Question 11

Which is NOT true about metals?

Accepted Answer

a gas at room temperature

Question 12

If a group or family has the same number of valence electrons, this means ____________________.

Accepted Answer

they have similar characteristics/properties

Question 13

Periodic Table: Elements are arranged from left to right and top to bottom in order of ______.

Accepted Answer

atomic number

Question 14

In an atom, the number of _______________ always equals the number of ________________.

Accepted Answer

protons; electrons

Question 15

A chemical equation showing same # of atoms on each side is _____________________.

Accepted Answer

balanced

Question 16

Sugar water is an example of a ______________.

Accepted Answer

solution

Question 17

The substances on the left side of the equation are known as the ____________.

Accepted Answer

reactants

Question 18

What kind of chemical reaction ABSORBS energy in the form of heat?

Accepted Answer

endothermic

Question 19

How many electrons does Chlorine have?

Accepted Answer

17

Question 20

How many neutrons does Barium have?

Accepted Answer

81

Question 21

What information do we get from the amount of protons in the atom?

Accepted Answer

atomic number

Question 22

If a mixture is heterogeneous and settles, scatters light, and can be filtered, it is a _______

Accepted Answer

suspension

Question 23

In chemical reactions, what is the law of conservation?

Accepted Answer

matter cannot be created or destroyed

Question 24

When you put a number UNDER the elements symbol, it is called the _______________.

Accepted Answer

subscript

Prull: Practice for Chapter #1 Test: Periodic Table

Questions 24

Prull: Practice for Chapter #1 Test: Periodic Table

Questions 24