Kov - C - Properties of Atoms & the Periodic Table

Question 1

The atomic mass is equal to the number of __.

Accepted Answer

protons & neutrons

Question 2

A chemical symbol represents the __ of an element

Accepted Answer

name

Question 3

The area around the nucleus where electrons are most likely to be found is called the

Accepted Answer

electron cloud

Question 4

Electrons have a ___ charge.

Accepted Answer

negative

Question 5

A particle that moves around the nucleus is a(n)

Accepted Answer

electron

Question 6

The identity of an element is determined by the number of

Accepted Answer

protons

Question 7

Protons have a __ charge.

Accepted Answer

positive

Question 8

Each energy level of an atom has a maximum numer of __ it can hold.

Accepted Answer

electrons

Question 9

The smallest piece of an element that still retains the properties of the element is a(n) __.

Accepted Answer

atom

Question 10

Atoms of the same element with different numbers of neutrons are called

Accepted Answer

isotopes

Question 11

Developed the first periodic table

Accepted Answer

Mendeleev

Question 12

The central core of an atom is called the

Accepted Answer

nucleus

Question 13

Elements that have properties of both metals and nonmetals are

Accepted Answer

metalloids

Question 14

A(n) __ is matter that is composed of one type of atom.

Accepted Answer

element

Question 15

Paticles of matter that make up protons and and neutrons are

Accepted Answer

quarks

Question 16

The weighted average mass of the mixture of isotopes is the

Accepted Answer

average atomic mass

Question 17

The elements arranged in vertical columns in the periodic table are called

Accepted Answer

both B & C, groups, families

Question 18

The atomic mass minus the atomic number equals the number of

Accepted Answer

neutrons

Question 19

Neutrons have a ____ charge.

Accepted Answer

no

Question 20

Horizontal rows of the periodic table are called

Accepted Answer

periods

Question 21

The number of protons in an atom is called the

Accepted Answer

atomic number

Questions 21