Elements, Compounds, And Atoms Test

Question 0

What are three groups elements are divided into? List two properties per group

Answer 0

Metals: malleable, conductors of heat and electric current
Non-metals: brittle, not good conductors of heat and electric currents
Metalloids: have properties of both metals and nonmetals

Question 1

What is an element

Answer 1

A substance that cannot be separated or broken down into simple substances by chemical means

Question 2

What part of the periodic table are metals nonmetals and metalloids found

Answer 2

Metals: Left
Non-metals: Right
Metalloids: In between

Question 3

Atom

Answer 3

Smallest unit of an element that maintains the properties of that element

Question 4

Molecule

Answer 4

2 or more atoms that joined together in a definite ratio

Question 5

Atoms are like….. And molecules are like …..

Answer 5

Atoms are like the letters in the alphabet and molecules are like words

Question 6

What is a nucleus in an Atom

Answer 6

In physical science, an atoms central region, which is made up of protons and neutrons

Question 7

Proton

Location in atom, charge, and mass

Answer 7

Middle around nucleus
Positive charge
1 AMU

Question 8

Neutron

Location in atom, charge, and mass

Answer 8

In the middle, next to the nucleus with protons
Neutrally charged
1 AMU slightly bigger than a proton though

Question 9

Electron

Location in atom, charge, and mass

Answer 9

Outside rings
Negatively charged
Zero AMU electron cloud

Question 10

What are electron clouds

Answer 10

A region around the nucleus of an atom where electrons are likely to be found

Question 11

Atomic number

Answer 11

The number of protons in the nucleus of an atoms, the atomic number is the same for all atoms of an element

Question 12

Atomic mass

Answer 12

The mass of an atom expressed an atomic mass units

Question 13

What is the atomic number of sodium

Answer 13

11

Question 14

What is the atomic mass of sodium

Answer 14

23

Question 15

How many protons, neutrons, and electrons are in a sodium atom

Answer 15

11 protons, 11 electrons, 12 neutrons

Question 16

What is the overall charge of a sodium atom on the periodic table

Answer 16

Neutral

Question 17

Who discovered the electron

What was the name of his model

Answer 17

JJ thomson plum pudding

Question 18

Who discovered that the nucleus was small, dense, and positively charged

Answer 18

Ernest Rutherford

Question 19

An atom contains mostly……

Answer 19

Empty Space!!!

Question 20

How much larger is the diameter of the entire atom compared to the diameter of its nucleus

Answer 20

100,000 times bigger

Question 21

Strong force

Answer 21

The strong force is the force that holds atoms together which is billions of times stronger than gravity

Question 22

True or false, there are more atoms in a penny then there are people on the earth

Answer 22

True

Question 23

23, 24,

Answer 23

Look on study guide

Question 24

What does the law of conservation of mass state

Answer 24

Mass cannot be created or destroyed but is instead changed into new substances that have different properties

Question 25

True or false, if the law of conservation of mass is true, the number of atoms that make up the product will be different than the number of atoms that make up the reactants

Answer 25

False # atoms in products and # of atoms in reactants should be the same