Quiz about 8.6 8.6 Matter and energy.

Question 1

What is the chemical symbol for Sodium?

Accepted Answer

Na

Answer

S

Answer

N

Answer

So

Question 2

Which of the following is a chemical change?

Accepted Answer

Burning wood

Answer

Melting ice

Answer

Tearing paper

Answer

Dissolving sugar in water

Question 3

Identify the element with atomic number 6 on the periodic table.

Accepted Answer

Carbon

Answer

Oxygen

Answer

Nitrogen

Answer

Hydrogen

Question 4

Which of the following best describes the conservation of mass in a chemical reaction?

Accepted Answer

Mass remains constant during the reaction.

Answer

Mass is lost during the reaction.

Answer

Mass is gained during the reaction.

Answer

Mass is irrelevant in chemical reactions.

Question 5

Using the periodic table, how many hydrogen atoms are in the chemical formula $$H_2O$$ ?

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 6

Which of the following is a metalloid?

Accepted Answer

Silicon

Answer

Iron

Answer

Gold

Answer

Helium

Question 7

Explain why photosynthesis is considered a chemical change.

Accepted Answer

It involves the rearrangement of atoms to form new substances.

Answer

It involves a change in state.

Answer

It involves a change in temperature.

Answer

It involves a change in color.

Question 8

Which of the following equations represents the conservation of mass in photosynthesis?

Accepted Answer

$$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$$

Answer

$$C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O$$

Answer

$$6CO_2 + 6H_2O \rightarrow 6O_2 + C_6H_{12}O_6$$

Answer

$$6O_2 + C_6H_{12}O_6 \rightarrow 6CO_2 + 6H_2O$$

Question 9

Predict the outcome if a metal reacts with a nonmetal.

Accepted Answer

Formation of an ionic compound

Answer

Formation of a covalent compound

Answer

No reaction occurs

Answer

Formation of a metallic compound

Question 10

Analyze the chemical equation $$2H_2 + O_2 \rightarrow 2H_2O$$ and determine if mass is conserved.

Accepted Answer

Yes, because the number of each type of atom is the same on both sides.

Answer

No, because there are more molecules on the right side.

Answer

Yes, because the total number of molecules is the same.

Answer

No, because the equation is not balanced.

Question 11

Evaluate the following statement: "All metals are good conductors of electricity." Is this true for all elements classified as metals on the periodic table?

Accepted Answer

No, some metals are poor conductors.

Answer

Yes, all metals are good conductors.

Answer

Yes, but only at high temperatures.

Answer

No, only nonmetals are good conductors.

Question 12

Determine the number of oxygen atoms in the compound $$C_6H_{12}O_6$$ .

Accepted Answer

6

Answer

12

Answer

18

Answer

24

Question 13

Which of the following processes is an example of a physical change?

Accepted Answer

Boiling of water

Answer

Rusting of iron

Answer

Burning of paper

Answer

Baking a cake

Question 14

Identify the group of elements known for having properties of both metals and nonmetals.

Accepted Answer

Metalloids

Answer

Alkali metals

Answer

Halogens

Answer

Noble gases

Question 15

Which of the following best describes a chemical reaction where mass is conserved?

Accepted Answer

The total mass of reactants equals the total mass of products.

Answer

The total mass of reactants is greater than the total mass of products.

Answer

The total mass of reactants is less than the total mass of products.

Answer

Mass is not a factor in chemical reactions.

Question 16

Using the periodic table, determine the number of protons in an atom of Chlorine.

Accepted Answer

17

Answer

18

Answer

35

Answer

36

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