10 Physical Science - Introductory Chemistry & The Periodic Table

Question 1

halogens: Very reactive (7 val electrons) , Gases, Form -1 charged anions, Diatomic – exist as two atoms,

Accepted Answer

True

Question 2

Substance made up of two or more different atoms bonded together

Accepted Answer

compound

Question 3

a stable subatomic particle occurring in atomic nuclei: positive charge equal in magnitude to that of an electron

Accepted Answer

proton

Question 4

products: substance that undergoes change, reactants: substance that is present after chemical reaction

Accepted Answer

False

Question 5

anion: positive charge, cation: negative charge

Accepted Answer

False

Question 6

A reaction or process accompanied by the release of heat

Accepted Answer

exothermic reaction

Question 7

the action or process of precipitating a substance from a solution

Accepted Answer

precipitation

Question 8

all gases, odorless, colourless, complete set of valence electrons (8e-), extremely low chemical reactivity

Accepted Answer

noble gases

Question 9

stable subatomic particle with negative charge, found in all atoms and acts as primary carrier of electricity in solids

Accepted Answer

electron

Question 10

a multiplier or factor that measures a particular property

Accepted Answer

coeffcient

Question 11

Substances made up of two or more atoms bonded together

Accepted Answer

molecule

Question 12

~the same mass as a proton but without electric charge, present in all atomic nuclei except those of ordinary hydrogen

Accepted Answer

neutron

Question 13

covalent bond: consists of the mutual sharing of one or more pairs of electrons between two atoms

Accepted Answer

True

Question 14

A chemical bond in which one pair of electrons is shared between two atoms, one atom may form multiple

Accepted Answer

single bond

Question 15

pure substance made up of only one type of atom

Accepted Answer

element

Question 16

a deficiency or excess of electrons which occurs on ungrounded or insulating surfaces

Accepted Answer

electrostatic charge

Question 17

When two pairs of electrons are shared, a variety of covalent bonds exist within a single molecule

Accepted Answer

double bond

Question 18

the total number of protons and neutrons in a nucleus

Accepted Answer

mass number

Question 19

ionic compound: neutral compounds made up of positively charged ions (cations) and negatively charged ions (anions)

Accepted Answer

True

Question 20

soluble: incapable of being dissolved, insoluble: able to be dissolved, especially in water

Accepted Answer

False

Question 21

decomposition: the state or process of rotting; decay, combination: a joining or merging of different parts or qualities

Accepted Answer

True

Question 22

diatomic elements: elements found in threes

Accepted Answer

False

Question 23

compounds made up of ions that form charged particles when an atom (or group of atoms) gains or loses electrons

Accepted Answer

ionic compound

Question 24

rapid chemical combination of a substance with oxygen, involving the production of heat and light

Accepted Answer

combustion

Question 25

A compound whose atoms are bonded via a covalent bond

Accepted Answer

covalent compound

Question 26

chemical reaction where two reactant ionic compounds exchange ions to form two new product compounds with the same ions

Accepted Answer

double replacement

Question 27

smallest unit of matter

Accepted Answer

atom

Question 28

single replacement: a reaction in which one element is substituted for another element in a compound

Accepted Answer

True

Question 29

When three pairs of electrons are shared

Accepted Answer

triple bond

Question 30

homogenous: uniform composition, heterogenous: non-uniform composition

Accepted Answer

True

Question 31

a set of elements occupying a vertical column in the periodic table.

Accepted Answer

group

Question 32

atomic number: the number of protons in the nucleus of an atom

Accepted Answer

True

Question 33

the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass

Accepted Answer

nucleus

Question 34

Two or more substances (elements or compounds) combined but not chemically bonded

Accepted Answer

mixture

Question 35

each of two or more forms of the same element: contain same no. of protons, different no. of neutrons in their nucleus

Accepted Answer

isotope

Question 36

type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound

Accepted Answer

ionic bond

Question 37

a process that involves rearrangement of the molecular or ionic structure of a substance

Accepted Answer

chemical reaction

Question 38

ion: an atom or molecule with a net electric charge due to the loss or gain of one or more electrons

Accepted Answer

True

Question 39

a natural process that converts a refined metal into a more chemically stable oxide

Accepted Answer

corrosion

Question 40

group: a set of elements occupying a horizontal row in the periodic table

Accepted Answer

False

Question 41

A change in matter which does not alter the chemical properties of the matter

Accepted Answer

physical change

Question 42

Low melting points, Soft&shiny,cations with charges of +1, one valence electron, react violently with water

Accepted Answer

alkali metals

Question 43

the properties and particles of a substances are different from the original, and the number of particles can change

Accepted Answer

chemical change

Question 44

A reaction or process accompanied by or requiring the absorption of heat

Accepted Answer

endothermic reaction

10 Physical Science - Introductory Chemistry & The Periodic Table

Questions 44

10 Physical Science - Introductory Chemistry & The Periodic Table

Questions 44