Science Exam Part 2

Question 1

Describes the ability of metal to reflect light.

Answer 1

Luster

Question 2

The ability to be pulled into thin wires.

Answer 2

Ductility

Question 3

Ability of a substance to be hammered into or rolled into sheets.

Answer 3

Malleability

Question 4

These types of metals are in group 1, they react quickly with other elements, such as oxygen. Therefor, in nature the only occur in compounds.

Answer 4

Alkali Metals

Question 5

Is an element that is generally shiny. It is easily pulled into wires or hammered into thin sheets. It’s also a good conductor of electricity and thermal energy.

Answer 5

Metal

Question 6

Elements in groups 3-12
Two blocks on the periodic table.
They have higher melting points, greater strength, and higher densities
React less quickly with oxygen

Answer 6

Transistor elements

Question 7

When Medeleev placed his list of elements into a table how did he arrange them?

Answer 7

In rows of increasing atomic mass.

Question 8

Henry Moselev changed what problem on the periodic table?

Answer 8

He found that if elements were listed in increasing atomic number, columns would contain elements with similar properties.

Question 9

A column on the periodic table.

Answer 9

Group

Question 10

Rows on the periodic table.

Answer 10

Periods

Question 11

Where are metals found on the periodic table?

Answer 11

On the left side and in the middle

Question 12

Where are no metals located on the periodic table?

Answer 12

The right side

Question 13

What can you learn about elements from the periodic table?

Answer 13

The periodic table shows how elements and their properties relate to each other. So we can use these patterns of properties to predict the properties of new elements.

Question 14

Sodium is in Group 1 of the periodic table. Sodium atoms readily form bonds with other atoms, which statement best explains this theory?

Answer 14

Sodium atoms need to give up only one valence electron.

Question 15

Elements that have no metallic properties.

Answer 15

Nonmetals

Question 16

An element in group 17 of the periodic table.

Answer 16

Halogen

Question 17

The elements in group 18

Answer 17

Noble gases

Question 18

Most common element in the universe?

Answer 18

Hydrogen

Question 19

An element that has physical and chemical properties of both metals and Nonmetals.

Answer 19

Metalliod

Question 20

Conducts electricity at high temps, but not at low temps.

Answer 20

Semiconductor

Question 21

A force that holds two or more atoms together.

Answer 21

Chemical bond

Question 22

Electrons closest to the nucleus have the least amount of what?

Answer 22

Energy

Question 23

Outermost electrons of am atoms that participates in chemical bonding.

Answer 23

Valence electron

Question 24

Chemical bond formed when two atoms share one or more pairs of valence electrons.

Answer 24

Covalent bonds

Question 25

Two or more atoms that are held together by covalent bonds and act as a unit.

Answer 25

Molecules

Question 26

A molecule with a slight negative charge in one area, and a slight positive charge in another.

Answer 26

Polar molecule

Question 27

An atom that is no,longer neutral because it has gained or lost valence electrons

Answer 27

Ion

Question 28

The attraction between positively and negatively charged ions in an ionic bond.

Answer 28

Ionic compound

Question 29

A bond formed when many metal atoms share their pooled valence electrons

Answer 29

Metallic bond

Question 30

Type of chemical reaction in which two or more substances combine and form one compound.

Answer 30

Synthesis

Question 31

One compound breaks down and forms two or more substances.

Answer 31

Decomposition.

Question 32

One element replaces another in a compound.

Answer 32

Single-replacement reaction.

Question 33

Negative ions in two compounds switch places, forming two new compounds.

Answer 33

Double-replacement reaction

Question 34

A chemical reaction in which a substance combines with oxygen and releases energy.

Answer 34

Combustion