Periodic Table/Matter

Question 1

Where are the most reactive nonmetals located on the periodic table?

Accepted Answer

the second column from the right side of the table

Question 2

Which choice best describes the properties of potassium (K), based on its position on the periodic table of elements?

Accepted Answer

a highly reactive metal

Question 3

Which substance is composed of only one type of atom?

Accepted Answer

gold

Question 4

How does the concept of conservation of mass apply to chemical reactions?

Accepted Answer

The reactants and products have exactly the same atoms.

Question 5

Elements in the periodic table are organized into columns and rows. The columns are organized to show what?

Accepted Answer

similarities of the reactivity in groups.

Question 6

What coefficient for O2 demonstrates the law of conservation of mass? CH4(g) + __O2(g) → CO2(g) + 2H2O(g)

Accepted Answer

2

Question 7

Which characteristic of an element determines its placement in the periodic table?

Accepted Answer

number of protons

Question 8

Which set of coefficients will balance this chemical equation?__C2H4(g) + __O2(g) → 2CO2(g) + 2H2O(g)

Accepted Answer

1, 3

Question 9

Which of the following is an example of a compound?

Accepted Answer

water

Question 10

What is the smallest unit of an element that retains the properties of that element?

Accepted Answer

atom

Question 11

What physical property is characteristic of all of the elements in group 18?

Accepted Answer

gas state at room temperature

Question 12

How many atoms are in one formula unit of the compound FeC5O5?

Accepted Answer

11

Question 13

Which is best represented by the equation? 2Mg + O2 ---> 2MgO

Accepted Answer

Law of Conservation of Mass

Question 14

Which best represents a balanced equation?

Accepted Answer

2H2 + O2 --> 2H2O

Question 15

How are elements similar to those in the same group on the periodic table?

Accepted Answer

They have the same number of valence electrons.

Question 16

Which term correctly describes all of the following materials? salt water, vinegar, bronze, air, beach sand

Accepted Answer

mixtures

Question 17

Which of these is one similarity of the elements in the first group of the periodic table?

Accepted Answer

The elements in the group react with oxygen in similar ways.

Question 18

Elements in the same column of the periodic table of the elements all

Accepted Answer

have similar physical characteristics.

Question 19

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

Accepted Answer

the column at the far left side of the table

Question 20

Which type of matter can be separated by physical means?

Accepted Answer

mixture

Questions 20