Main chemistry concepts so far

What type of bond is formed when non-metal atoms share valence electrons?

• Ionic bond

• Hydrogen bond

• Metallic bond

• Covalent bond

Tags

NGSS.HS-PS1-1

Explain the concept of atomic number.

• The atomic number is the number of electrons in an atom's nucleus.

• The atomic number is the number of neutrons in an atom's nucleus.

• The atomic number is the number of isotopes in an atom.

• The atomic number is the number of protons in an atom's nucleus.

How does the bonding type contribute to the physical properties of materials?

• Compounds bonded with ionic bonds have lower melting points

• Compounds bonded with covalent bonds have lower melting points

• Intermolecular forces between polymers are very strong

• Covalent compounds conduct electricity well

Tags

NGSS.HS-PS2-6

How does the bonding type contribute to the physical properties of materials?

• The weak bonds between polymer strands make them flexible

• The strong covalent bonds in a polymer make them flexible

• The weak ionic bonds in a polymer make them flexible

• The weak bonds between polymer strands make them rigid

Tags

NGSS.HS-PS2-6

Is this an atom, compound, element, molecule, or mixture? (There may be more than one correct answer!)

• Atom

• Compound

• Element

• Molecule

• Mixture

Tags

NGSS.MS-PS1-1

Is this an atom, compound, element, molecule, or mixture? (There may be more than one correct answer!)

• Atom

• Compound

• Element

• Molecule

• Mixture

Tags

NGSS.MS-PS1-1

Is this an atom, compound, element, molecule, or mixture? (There may be more than one correct answer!)

• Atom

• Compound

• Element

• Molecule

• Mixture

Tags

NGSS.MS-PS1-1

How many atoms are present in the chemical formula H₂O?

• 1

• 4

• 5

• 3

Tags

NGSS.MS-PS1-1

How many atoms are present in a molecule of glucose?

• 24

• 6

• 32

• 1

Tags

NGSS.MS-PS1-1

How many atoms are present in the compound magnesium hydroxide - Mg(OH)₂ ?

• 3

• 5

• 6

• 4

Tags

NGSS.MS-PS1-1