CHEM-1

Question 1

ATOM

Answer 1

tiny particles making up all

mass

Question 2

PROTONS AND NEUTRONS

Answer 2

collectively called nucleons making up the nucleus of an atom

Question 3

STRONG NUCLEAR FORCE

Answer 3

hold together protons and neutrons to form the nucleus

Question 4

ELECTRONS

Answer 4

surrounds the nucleus at a distance of 1-3 Angstroms

Question 5

Mass of an electron is about ___ times smaller than the mass of a nucleon.

Answer 5

1800

Question 6

Matter is mostly ____ space.

Answer 6

empty

Question 7

ELEMENTS

Answer 7

are building blocks of compounds and can’t be decomposed into simpler substance by chemical means

Question 8

ATOMIC NUMBER

Answer 8

indicates the number of protons

Question 9

An element may have any number of electrons and neutrons but __________ number of protons.

Answer 9

only one

Question 10

MASS NUMBER

Answer 10

sum of protons and neutrons

Question 11

Not every atom of a given element will have a mass equal to the mass number because isotopes of an atom have different numbers of _______.

Answer 11

neutrons

Question 12

ISOTOPES

Answer 12

two or more atoms of the same element that contain different number of neutrons.

Question 13

ION

Answer 13

atom than has an unequal number of protons and electrons creating a charge.

Question 14

CATION

Answer 14

atom carrying more protons than electrons having a + charge

Question 15

ANION

Answer 15

atom carrying more electrons than protons having a - charge

Question 16

SALT

Answer 16

neutral compound composed of a positive and a negative ion together

Question 17

Changing the number of neutrons creates a(n) ____

Answer 17

isotope

Question 18

Changing the number electrons creates a(n) _____

Answer 18

ion

Question 19

Changing the number of protons creates a(n)

____

Answer 19

different element

Question 20

PERIOD

Answer 20

horizontal row in periodic table

Question 21

GROUPS/FAMILIES

Answer 21

vertical columns i periodic table

Question 22

METALS

Answer 22

large atoms that tend to lose electrons to form positive ions and oxidation states