Chemistry Test 1: Mystery Mixture and Periodic Table

Question 1

A pure substance that cannot be broken down into simpler substances:

Accepted Answer

element

Question 2

A substance can be identified by:

Accepted Answer

all of the above

Question 3

What is the difference between CO and Co?

Accepted Answer

Both answer 2 and 3 are correct.

Question 4

A code that represents the number and kinds of atoms in one particle of a substance:

Accepted Answer

chemical formula

Question 5

What elements are in NaHCO3?

Accepted Answer

sodium, hydrogen, carbon, & oxygen

Question 6

In general, as you move from left to right on the periodic table:

Accepted Answer

the elements are less reative

Question 7

What 6 elements make life possible?

Accepted Answer

Carbon, hydrogen, nitrogen, oxygen, phosphorus, &sulfur

Question 8

What might cause NaCl to become poisonous?

Accepted Answer

If it were separated in Na and Cl

Question 9

A subscript is:

Accepted Answer

A number that tells us how many atoms of an element there are in a formula

Question 10

A chart that displays chemical elements by their atomic number:

Accepted Answer

Periodic Table

Question 11

What are the rows of the periodic table called?

Accepted Answer

periods

Question 12

Properties related to how well an element will combine with other elements:

Accepted Answer

chemical properties

Question 13

Properties that can be measured or observed without changing the element:

Accepted Answer

physical properties

Question 14

The modern periodic table is organized in order of:

Accepted Answer

atomic number

Question 15

The modern periodic table organizes and displays all the elements from _____ to ____.

Accepted Answer

simplest, most complex

Question 16

How was Mendeleev able to predict the existence of elements that had not yet been discovered?

Accepted Answer

He saw that there were gaps in the pattern of the atomic masses.

Question 17

Anything that has mass and takes up space.

Accepted Answer

matter

Question 18

All elements begin with a:

Accepted Answer

capital letter

Question 19

What substances were combined to make the mystery mixture?

Accepted Answer

citric acid and sodium bicarbonate

Question 20

A kind of matter with uniform physical and chemical properties:

Accepted Answer

substance

Question 21

What is special about the noble gasses.

Accepted Answer

They are nonreactive.

Question 22

What elements are combined in the mystery mixture?

Accepted Answer

sodium, carbon, hydrogen, & oxygen

Question 23

A substance that cannot be separated into components or parts by physical separation methods:

Accepted Answer

chemical substance

Question 24

A particle made up of two or more atoms and held together with a strong bond:

Accepted Answer

molecule

Question 25

Rare earth elements get their name from the fact that they are:

Accepted Answer

hard to separate from other rock

Question 26

The number of protons in an atom and the number that identifies the element:

Accepted Answer

atomic number

Question 27

What information can you find on the periodic table?

Accepted Answer

all of the above

Question 28

The columns of the periodic table are called:

Accepted Answer

groups

Question 29

How are matter and elements related?

Accepted Answer

All matter is made of elements.

Question 30

What elements are in CO2?

Accepted Answer

carbon & oxygen

Question 31

What does an atomic number tell us about an element?

Accepted Answer

how many protons it has

Question 32

How can there be so many differnt substances on Earth if there are only a few common elements?

Accepted Answer

because of all the combinations that are possible

Chemistry Test 1: Mystery Mixture and Periodic Table

Questions 32

Chemistry Test 1: Mystery Mixture and Periodic Table

Questions 32