8th Grade Chemistry Pre-Test

8th Grade Atomic Structure & Periodic Table Pre-Test

Mrs. Harris

Multiple Choice

all matter is made of what 

• energy 
• atoms 
• electrons 
• compounds 

Multiple Choice

The positive particles of an atom are 

• electrons 
• neutrons 
• protons 

Multiple Choice

the central region of an atom where its neutrons and protons are is its 

• nucleus 
• electron cloud
• core 
• center 

Multiple Choice

Particles in an atom that are neutral and have no charge are 

• electrons 
• neutrons 
• protons 

Multiple Choice

Most of the mass of an atom is found in the ______.

• nucleus

• proton

• electron cloud

• isotope

Multiple Choice

The smallest particle with characteristics of an element is known as the

• Periodic Table

• Atom

• Proton

• Electron

Multiple Choice

How does the size of a proton compare to the size of a neutron?

• larger
• smaller
• equal

Multiple Choice

These particles orbit around the nucleus of an atom.  What are they called?

• electrons
• protons
• neutrons

Multiple Choice

These are the SMALLEST subatomic particles

• Proton

• Neutron

• Electron

Multiple Choice

From the diagram, which particles are indicated with the arrow?

• electrons and protons
• protons and neutrons
• electrons and neutrons

Multiple Choice

In terms of matter, the atom is almost entirely filled with _____

• orbiting electrons
• charged protons
• heavy neutrons
• empty space

Multiple Choice

Why is the overall charge of an atom neutral (0)?

• They have the same number of protons and neutrons.

• They have the same number of protons and electrons.

• They have the same number of electrons and neutrons.

Multiple Choice

An atom with atomic number 6 would have how many protons

• 6

• 12

• 3

• cannot be determined

Multiple Choice

In the modern periodic table, elements are arranged by:

• atomic mass

• atomic number

• valence electrons

• number of isotopes

Multiple Choice

What does the 1.00794 stand for?

• Hydrogen

• atomic number

• atomic mass

• atomic explosion

Multiple Choice

If an atom has 10 protons, 10 neutrons, and 10 electrons, what is the mass of the atom?

• 10

• 20

• 30

Multiple Choice

True/False: Compounds are made of two or more different elements.

• True

• False

Multiple Choice

Most of the mass in an atom is concentrated in the...

• electrons

• nucleus

• protons

• empty space

Multiple Choice

An arrangement of elements in order of their atomic numbers such that elements with similar properties fall in the same column or group.

• Atomic Number

• Electron Cloud

• Periodic Table

• Nucleus

Multiple Choice

Each column in the periodic table is called a 

• period
• group
• cluster
• unit

Multiple Choice

The atomic number tells you what?

• number of electrons
• number of protons
• number of neutrons
• both electrons and protons in an atom.

Multiple Choice

What is the name of the group that never reacts--ever ever they are stable with a full outermost ring!!!

• noble gases
• transition
• halogens
• borons

Multiple Choice

What is the chemical symbol for Lithium?

• H
• He
• Li
• N

Multiple Choice

The horizontal row on the periodic table is called a

• group
• family
• period
• atomic number

Multiple Choice

How did Mendeleev arrange the elements?

• alphabetical 
• density
• melting point
• atomic mass

Multiple Choice

Dimitri found that there was a pattern of properties that repeated every ____ elements.

• 2
• 4
• 5
• 7

Multiple Choice

What group of elements don't have individual names?

• Alkaline-earth Metals
• Transition Metals
• Alkali Metals
• Halogens

Multiple Choice

Most of the elements on the periodic table are classified as _____.

• Metals
• Nonmetals
• Metalloids
• Periods

Multiple Choice

Balance this equation:
MgCl₂ --> Mg₄+ Cl₂

• It's already balanced.
• 4MgCl₂ --> Mg₄+ 4Cl₂
• 4MgCl₂ --> Mg₄+ 5Cl₂

Multiple Choice

The substances listed on the left side of a chemical equation are the

• Products
• Coefficients
• Precipitates
• Reactants

Multiple Choice

In chemical reactions, what does the principle of conservation of mass mean?

• Matter is not created or destroyed.
• The total mass of the reactants is greater than the total mass of the products.
• The total mass of the reactants is less than the total mass of the products.
• Matter is not changed.
  

Multiple Choice

Name the part in red:

H₂ + O₂ -> H₂O

• Coefficient
• Product
• Yield
• Subscript

Multiple Choice

Name the part in red:

H₂ + O₂ -> H₂O

• Coefficient
• Product
• Reactant
• Subscript

Multiple Choice

Some elements combine chemically and no longer have the same ________________ they did before forming a compound.

• valence electons
• energy
• properties
• group number

Multiple Choice

A _________________ is composed of symbols and subscripts indicating the number of atoms of an element in a compound.

• Chemical Equation
• Chemical Reaction
• Synthesis Reaction
• Chemical Notation

Multiple Choice

A ____________is the force that holds atoms together in a compound.

• Chemical Formula
• Chemical Reaction
• Chemical Bond
• Synthesis Reaction

Multiple Choice

An ionic compound is held together by the _______--the force of attraction between opposite charges of the atoms.

• Covalent Bond
• Ionic Bond
• Synthetic Bond
• Molecular Bond

Multiple Choice

How are covalent bonds formed?

• Sharing of electrons
• Transfer of electrons

Multiple Choice

Why do elements bond?

• To be friends
• To create a new element
• To become stable

Multiple Choice

Where are the nonmetals located on the periodic table? 

• Blue
• Red
• Green

Multiple Choice

Covalent Bonds ______________ valence electrons.

• give

• take

• keep

• share

Multiple Choice

Atoms joined together by SHARING electrons are?

• Ionic bonds
• Covalent bonds
• Metallic Bonds
• James Bonds

Multiple Choice

How many electron can fit on the first electron shell?

• 2
• 8
• 18
• 32

Multiple Choice

An elements in group 2 has how many valence electrons?

• 1
• 2
• 3
• 4

Multiple Choice

A bond between two nonmetals is an

• Ionic Bond
• Covalent Bond
• Metallic Bond