Ch 4 The Periodic Table of the Elements Grade 8

Question 1

All elements are composed of extremely small particles called....

Accepted Answer

atoms

Question 2

Which of the following statements about transition metals is true?

Accepted Answer

They include familiar metals such as Au, Ag, Cu & Ni

Question 3

What is another name for carbon compounds?

Accepted Answer

organic compounds

Question 4

In an atom the number of protons equals the number of _________________

Accepted Answer

electrons

Question 5

If you describe methane as a gas that easily catches fire, you are describing a _____

Accepted Answer

chemical property

Question 6

The atomic number of an element is based on the ________________.

Accepted Answer

number of protons in its nucleus

Question 7

The elements in a column of the periodic table...

Accepted Answer

have similar properties

Question 8

CaCO3 represents a chemical.....

Accepted Answer

formula

Question 9

To make most synthetic elements, scientists use powerful machines called.....

Accepted Answer

particle accelerators

Question 10

An element whose atoms can make straight chains, branched chains and rings is______.

Accepted Answer

carbon

Question 11

One example of a chemical change is ____

Accepted Answer

burning wood

Question 12

Chemistry is_______

Accepted Answer

the study of matter and how matter changes

Question 13

Carbon is able to bond with atoms of other elements in many different ways because it has....

Accepted Answer

4 valence electrons

Question 14

Which particles in an atom are in the nucleus?

Accepted Answer

protons and neutrons

Question 15

Which parts of the atom move around the nucleus?

Accepted Answer

electrons

Question 16

The best way to put out a small kitchen fire is to...

Accepted Answer

cover it or use a home fire extinguisher

Question 17

H2O, CO2 and C12H22O11 are all examples of chemical

Accepted Answer

formulas

Question 18

A material is said to be ductile if it__________________________.

Accepted Answer

can be pulled out, or drawn into a long wire.

Question 19

The atomic number is the number of ______.

Accepted Answer

protons in the nucleus of an atom

Question 20

Which form of pure carbon is so hard that it can be used in cutting tools?

Accepted Answer

diamond

Question 21

From an element's location in the periodic table, you can predict____________.

Accepted Answer

its properties.

Question 22

One example of a physical change is

Accepted Answer

dissolving salt in water

Question 23

Which of the statements about a coumn of the periodic table is true?

Accepted Answer

The elements have similar properties.

Question 24

Mendeleev created the first periodic table by arranging elements in order of_______________

Accepted Answer

increasing atomic mass

Question 25

The sun is made up mostly of

Accepted Answer

hydrogen

Question 26

How many chemical bonds can each carbon atom form?

Accepted Answer

4

Question 27

Fluorine, chlorine, bromine, and iodine are part of a family called___________.

Accepted Answer

halogens

Question 28

In the periodic table, the most reactive metals are found______________

Accepted Answer

In Group 1, the first column on the the left.

Question 29

A row across the periodic table is called a______

Accepted Answer

period

Question 30

What holds atoms together in a molecule?

Accepted Answer

chemical bonds

Question 31

Table sugar and table salt are examples of____.

Accepted Answer

pure substances

Question 32

Each family in the periodic table has its own characteristic properties based on the # of_____.

Accepted Answer

valence electrons

Question 33

The elements in a row of the periodic table....

Accepted Answer

have very similar chemical symbols

Question 34

The measurement of how much mass is contained in a given volume is called....

Accepted Answer

density

Question 35

The two most common alkaline earth metals are.......

Accepted Answer

calcium and magnesium

Question 36

Because atoms are so small...............

Accepted Answer

scientists create models to describe them.

Question 37

Which group contains the most elements?

Accepted Answer

metals

Question 38

The energy of matter in motion is called

Accepted Answer

kinetic energy

Question 39

The smallest particle of an element is called a(n).,,,,

Accepted Answer

atom

Question 40

Which of the following is NOT an example of a chemical change?

Accepted Answer

salt dissolving in a glass of water

Question 41

Most metals are NOT________________.

Accepted Answer

liquid at room temperature.

Question 42

The measurement of how much matter an object contains is its

Accepted Answer

mass

Question 43

Anything that has mass and takes up space is called.....

Accepted Answer

matter

Question 44

What can you tell about methane (CH4) from its molecular formula?

Accepted Answer

It contains four hydrogen atoms.

Question 45

In general, which of the following statements about metals is true?

Accepted Answer

Metals show a wide range of chemical properties.

Question 46

What information in the periodic table indicates the number of protons in an atom?

Accepted Answer

the element's atomic number

Question 47

Which particles in atoms have a negative charge?

Accepted Answer

electrons

Question 48

What is the greatest number of valence electrons an atom can have?

Accepted Answer

8

Question 49

Electrons involved in bonding between atoms are_____.

Accepted Answer

valence electrons

Question 50

When an atom loses an electron, it becomes a.......

Accepted Answer

positive ion.

Ch 4 The Periodic Table of the Elements Grade 8

Questions 50

Ch 4 The Periodic Table of the Elements Grade 8

Questions 50