Chemistry Review

Elements have the most similar properties if they are in the same _______?

• Periods

• Groups

• Rows

• Blocks

What type of elements does the image show?

• Metals

• Nonmetals

• Gases

• Metalloids

Which physical property would most likely be a nonmetal

• Good conductor

• Ductile

• Brittle

• Shiny

Which is the best estimate of the melting point of Rubidium (Rb)?

• 25* C

• 40* C

• 75* C

• 184* C

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Two different liquids are poured together in an open container. Bubbles begin to form. After the bubbling stops, it is determined that the total weight of the two liquids is less than before they were poured together. Which best describes this observation?

• Some of the atoms during the reaction escaped into the air.

• Some of the atoms during the reaction were destroyed.

• Some of the atoms during the reaction became heavier.

• Some of the atoms during the reaction changed to a different kind of atom.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

This is a chemical reaction for the decomposition of carbonic acid into water and carbon dioxide. How does this reaction support the Law of Conservation of Mass?

• Several molecules of water are produced.

• The mass of carbon atoms is reduced during the reaction.

• The mass of the atoms in the reactant equals the mass of the atoms in the products.

• The mass of hydrogen atoms is the only thing that remains the same before and after the reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which statement is true about a chemical reaction?

• The physical states of the atoms in the reactants determine the products.

• Some of the atoms in the reactants will be a part of the products.

• The number of atoms in the reactants determines the products.

• All of the atoms in the reactants will be a part of the products.

Tags

NGSS.MS-PS1-5

Which best describes the sequence o the elements in Period 5 of the periodic table?

• highly reactive gases, relatively non reactive metals, metalloids, very nonreactive gases, nonreactive nonmetals

• highly reactive metals, relatively nonreactive metals, metalloids, reactive nonmentals, reactive gases

• nonreactive gases, metalloids, nonreactive metals, highly reactive metals, highly reactive gases

• nonreactive gases, nonreactive metals, highly reactive metals, metalloids, reactive nonmetals, reactive gases

Chlorine has 7 valence electrons. With what group of elements will chlorine most readily bond?

• group 1

• group 2

• group 16

• group 18

Which chemical equation best represents the Law of Conservation of Mass?

Tags

NGSS.MS-PS1-5