Chemistry

Question 1

How do atoms bond?

Answer 1

by gaining losing or sharing electrons to have a filled outermost energy level. (Valence shell)

Question 2

Ionic bond

Answer 2

Force of attraction between opposing charged Ions. (Transfered or taken) Ionic bonds = metal+ nonmetal. Ionic bonds are also called metallic bonds.

Question 3

Ions

Answer 3

An atom that has a different number of electrons than usual. Charged particles that form during chemical changes when one or more valence electrons transfer from one atom to another.

Question 4

An-Ion

Answer 4

Negative/gained electrons

Question 5

Cat-Ion

Answer 5

Positive/lost electrons

Question 6

Covalent bonds

Answer 6

A force of attraction between the nuclei of atoms and electrons shared by the atoms. covalent bonds are also called molecular bonds. (Shared) Non-metal+Non-metal Metalloid+Non-metal.

Question 7

Molecule

Answer 7

A neutral group of atoms held together by covalent bonds

Question 8

Binary compounds

Answer 8

A compound which is composed of 2 elements.

Question 9

Law of conservation of mass/matter

Answer 9

In a chemical reaction no mass is lost or gained

Question 10

Synthesis reaction

Answer 10

A reaction in which two or more substances combine to form a single compound.

Question 11

Synthesis reactions examples

Answer 11

Sodium reacting with chlorine to form sodium chlorine.

Question 12

Decomposition reaction

Answer 12

A reaction in which a single compound breaks down to form two or more simpler substances.

Question 13

Decomposition reaction examples

Answer 13

The break down of water into hydrogen and oxygen by process called electrolysis.

Question 14

Single replacement reaction

Answer 14

a reaction in which an element takes the place of another element that is part of a compound

Question 15

Single replacement reaction example

Answer 15

Zinc reacting with hydrochloric acid to form zinc chlorine and hydrogen gas.

Question 16

Double replacement reaction

Answer 16

A reaction in which ions in two compounds switch places.

Question 17

Double replacement reaction example

Answer 17

Sodium chloride reacting with silver fluoride to form sodium fluoride and precipitate silver chloride.

Question 18

Exothermic reaction

Answer 18

A chemical reaction in which energy is released or removed.

Question 19

Exothermic reaction examples

Answer 19

Energy released when the chemical of a light stick combine when the stick is cracked

Question 20

Endothermic reaction

Answer 20

A chemical reaction in which energy is absorbed.

Question 21

Endothermic reaction example

Answer 21

Energy being absorbed by the chemicals in an instant ice pack when chemicals are combined.

Question 22

Isotope

Answer 22

An atom that has a different number of neutrons than usual. (Almost every atom)

Question 23

Do metals lose or gain electrons?

Answer 23

Lose

Question 24

Do non metals gain or lose electrons?

Answer 24

Gain

Question 25

Four clues of a chemical reaction

Answer 25

1. The formation of gas bubbles. 2. The formation of a solid in a solution. 3. Color change of substance. 4. release or absorb energy of any kind.

Question 26

Precipitate

Answer 26

The formation of a solid in a solution.