6th Comp Study # 2

Which of the following elements would form a covalent compound with Iodine?

• Scandium

• Selenium

• Calcium

• Cerium

The correct name for the compound N₂O₃ is _______.

Which of these pairs of elements can be joined by a covalent bond?

• C and K

• C and Fe

• C and Fr

• C and Cl

Which of the following compounds, only ______ will have covalent bond.

Tags

NGSS.HS-PS1-1

What is the name of the compound IF₇?

• Moniodine heptafluoride

• Iodine hexafluoride

• Iodine heptafluoride

• Iodine octofluoride

What is the name of the following compound, P₂O₅?

• Phosphorous Oxide

• Phosphorous pentoxide

• Pentaphosphorous dioxide

• Diphosphorous pentoxide

This is the substance that you end with in a chemical reaction and is usually on the right side of an equation.

• Reactant

• Product

• Molar Mass

• Stoichiometric Ratio

In this reaction, what is H₂O₂?

H₂O₂ -> H₂ + O₂

• Reactant

• Product

• Inhibitor

• Precipitate

You mix together a clear solution of KF and a clear solution of Pb(NO₃)₂ in a beaker. You observe the formation of a white precipitate at the bottom of the beaker. Is the change you observed a physical or chemical change?

• Physical change, because nothing new was formed

• Physical change, because there was no explosion

• Chemical change, because nothing new was formed

• Chemical change, because a precipitate was formed.

Which of the following must occur in all chemical reactions?

• Atoms are rearranged to form new substances

• Atoms are stuck in a fixed location

• A substance changes from a solid to a gas

• Molecules are accelerated to very high speeds.

Tags

NGSS.HS-PS1-7