Chemistry Test Review

Presentation

•

Science

•

7th - 9th Grade

•

Hard

Joseph Anderson

FREE Resource

5 Slides • 40 Questions

Chemical reaction test review

Atomic structure

Multiple Choice

Subatomic particles with a negative charge

Electrons

Neutrons

Protons

Quarks

Multiple Choice

Subatomic particles with a positive charge

neutrons

atomic mass

protons

isotopes

Multiple Choice

Measure mainly of the nuclear particles: protons + neutrons

Subatomic Particles

Atomic Number

Atomic Mass

Gluons

Multiple Choice

Value representing the number of protons in an element

Atomic Mass

Mass Number

Valence Electrons

Atomic Number

Multiple Choice

Subatomic particles that are neutral in charge

Neutrons

Protons

Nucleus

Electrons

Multiple Choice

The smallest particle of an element.

Element

Molecule

Atom

Multiple Choice

What is the atomic mass of Neon?

Multiple Choice

What is one way Neutrons are different from electrons?

they both are negative

neutrons have no charge, while electrons have a negative charge

Both are in the nucleus( center of atom)

Electrons are inside nucleus and neutrons are outside the nucleus.

Multiple Choice

What is the atomic number?

Multiple Choice

How many protons and electrons does this element have?

Multiple Choice

How many neutrons does Chlorine have?

Multiple Choice

What is the atomic mass of Arsenic?

107

Multiple Choice

How many neutrons does calcium have?

Couting Atoms

Multiple Choice

How many atoms of Hydrogen are in H₂O

more than 3

Multiple Choice

How many different elements are present in H₂COCH₂

Multiple Choice

Calculate the number of Oxygen atoms in Al(OH)₃

Multiple Choice

The ______ are numbers found on the lower right-hand side of an element symbol.

Coefficient

Exponent

Multiplier

Subscript

Multiple Choice

Coefficients in chemical formulas...

Multiply just the first atom

Add to the subscripts at the end of the molecule

Multiply elements without subscripts

Multiply EVERYTHING!

Multiple Choice

4CF₂Cl₂

C = 4, F = 4, Cl = 2

C = 1, F = 8, Cl = 8

C = 4, F = 8, Cl = 8

C = 1, F = 4, Cl = 8

Multiple Choice

C₃H₅(NO₃)₃

C = 3, H = 5, N = 3, O = 9

C = 3, H = 5, N = 1, O = 9

C = 9, H = 15, N = 3, O = 9

C = 9, H = 15, N = 1, O = 3

Multiple Choice

H₂SO₄

H = 2, S = 4, O = 4

H = 2, S = 1, O = 4

H = 8, S = 4, O = 4

H = 2, SO = 4

Multiple Choice

How many different elements are present in this molecule?

3 NH₄C₂H₃O₂

Multiple Choice

A ______ is a number written in front of a chemical formula.

Coefficient

Subscript

Exponent

Coordinator

The law of conservation of mass

Multiple Choice

A chemical reaction is balanced when

both sides have the same elements

Both sides have the same number of atoms

Same subscripts

Same coefficients

Multiple Choice

Which of these is not a chemical reaction?

Burning of wood

Milk going bad

Mixing vinegar and baking soda

Melting of ice

Multiple Choice

If reaction starts with 20g of reactants it should produce

a total of 40g of products

a total of 10g of products

a total of 80 g of products

a total of 20g of products

Multiple Choice

What is the Law of Conservation of mass?

Mass is created in a chemical reaction

Mass is created in a physical change

New chemicals formed from a chemical reaction have a larger overall mass than the original reactants

Mass is never created or destroyed

Multiple Choice

When sodium and chlorine combine to form sodium chloride, sodium chloride is the:

Originator

Reactant

Product

Produce

Multiple Choice

Maria fills a bowl with 200 g of water. She puts the bowl of water in the freezer, and the water freezes. Which will most likely be the mass of the frozen water?

50 g

100 g

200 g

400 g

Multiple Choice

Law of conservation of mass states the amounts of atoms in the reactants and the products...

Increase

Decrease

Stay the same

No correct answer

Multiple Choice

Does the equation H₂+O₂→H₂O follow the Law of Conservation of Mass?

Yes, because the atoms are equal.

No, because more info is needed.

No, because there are more atoms in the product.

No, because there are more atoms in the reactant.

Multiple Choice

Matter can not be created nor destroyed: it can only be

Destroyed a little bit

Invisible

Transformed, changed

None of the above

Endothermic and Exo thermic

Multiple Choice

What type of reaction occurs in a hand warmer

exothermic

endothermic

Multiple Choice

Exothermic reactions...

Absorb energy

Release energy

Release Color

Absorb Color

Multiple Choice

In an endothermic reaction, heat is ...

taken in or absorbed

given out or released

Multiple Choice

Have you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?

It is an exothermic reaction

It is an endothermic reaction

It is made of ice

It is dissolving your mouth

Multiple Choice

0_{2 (g)+}2H_{2-------------}2H₂0 + Energy

endothermic

exothermic

Multiple Choice

6CO₂ + 6H₂0 + Energy --------------- C₆ H₁₂ 0₆ + 6O₂

endothermic reaction

exothermic reaction

Multiple Choice

_____ reactions usually feel hot!

endothermic

exothermic

Multiple Choice

____ reactions usually feel cold.

endothermic

exothermic

Chemical reaction test review

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