Compounds/Chemical Formulas/Bonds-8th

The chemical formula for water is H2O. Use the periodic table to identify which atoms H2O is made of.

• Helium and osmium

• Helium and oxygen

• Hydrogen and osmium

• Hydrogen and oxygen

Tags

NGSS.MS-PS1-1

Which of the following statements is NOT true?

• Aluminum hydroxide and carbonic acid contain the same number of oxygen atoms.

• Ethylene glycol contains more hydrogen atoms than the other three chemicals.

• Ethylene glycol has the most types of atoms and the highest number of atoms.

• Magnesium hydroxide and carbonic acid have the same number of atoms.

Tags

NGSS.MS-PS1-1

Which of the following statements is true?

• All the sweeteners are elements.

• Sucralose contains calcium.

• Sucrose has the most types of atoms and the fewest total atoms.

• The three artificial sweeteners have more types of atoms and more total atoms than sucrose.

Tags

NGSS.MS-PS1-1

Which model can represent a molecule of carbon dioxide, CO₂?

Tags

NGSS.MS-PS1-1

In a carbon dioxide molecule, each oxygen atom shares four electrons with the carbon atom. What kind of bond is this?

• ionic

• nonpolar covalent

• double covalent

• triple covalent

Tags

NGSS.HS-PS1-1

In the compound H₂O, the electrons in the bonds are unequally shared between oxygen and hydrogen. What kind of bond is this?

• ionic bond

• negative bond

• polar covalent bond

• nonpolar covalent bond

Which kind of molecular model shows electrons individually?

• dot diagram

• structural formula

• ball-and-stick model

• space-filling model

Which is NOT true of molecules?

• They are composed of atoms.

• They contain covalent bonds.

• Some are made up of only one element.

• They are less stable than their elements.

Tags

NGSS.MS-PS1-1

Covalent bonds are between...

• two or more nonmetals
• sodium and chlorine
• metals and metals
• metals and nonmetals

Tags

NGSS.MS-PS1-1

A substance that is made up of only one kind of atom is a(n)

• compound

• homogeneous mixtures

• element

• solution

Tags

NGSS.MS-PS1-1