Chemistry Part 2 Quizizz

How are elements in the same group on the periodic table similar?

• They have the same number of valence electrons.

• They have the same number of electrons.

• They have the same number of protons.

• They have the same atomic mass.

What category of elements is found between the metals and nonmetals on the periodic table?

• synthetic

• metalloids

• radioactive

• noble gases

What do the atomic numbers represent?

• number of atoms

• number of protons

• number of neutrons

• number of electrons

Which best explains why the alkali metals are the most reactive group in the periodic table?

• They are radioactive.

• They have complete outer energy levels.

• They have the highest atomic masses of any elements.

• They have only one electron in their outer energy level.

Elements in the same column of the periodic table of the elements all...

• have the same number of protons.

• share the same atomic structure.

• have similar physical characteristics.

• share the same number of neutrons.

How many atoms are in one formula unit of the compound FeC₅O₅?

• 5

• 11

• 15

• 26

A student studies four chemicals in a laboratory investigation.

Which chemical cannot be further broken down into other chemicals using ordinary laboratory processes?

• 1

• 2

• 3

• 4

Which best describes the total amount of mass present in a chemical reaction?

• It increases during the reaction.

• It decreases during the reaction.

• It remains the same during the reaction.

• It may increase or decrease during the reaction.

Does the following equation support the law of conservation of mass?

2CrCl₃ + 3NaOH → Cr₂O₃ + 3HCl + 3NaCl

You need a piece of paper to count it out your atoms. Make a t-chart with the atoms of the reactants on the left and the products on the right.

• No, because there are too many compounds.

• Yes, because every component is a compound.

• No, because the number of reactants is less than the number of products.

• Yes, because the number of atoms stays the same even when they are rearranged.

Which best explains the importance of balancing a chemical equation?

• A balanced chemical equation indicates the type of reaction.

• A balanced chemical equation indicates the loss of products and the gain of reactants.

• A balanced chemical equation indicates the exact number of atoms involved in a reaction.