Small molecules

What do we call a chemical substance made up of 2 or more different types atoms bonded together?

• formula
• atom
• subscript
• compound

Tags

NGSS.MS-PS1-1

All ____________ are made up of two or more atoms bonded together.

• atoms
• molecules
• electrons
• elements

Tags

NGSS.MS-PS1-1

What two types of atoms make a covalent bond?

• 2 Nonmetals
• 1 Nonmetal and 1 Metal
• 2 Metals
• 2 Noble Gases

Tags

NGSS.MS-PS1-1

How are covalent bonds explained?

• When one atom takes the other atom's electron
• When the atom shares an electron with an another atom
• When the two nucleus merge
• When the neutrons leave the nucleus

Tags

NGSS.MS-PS1-1

Which of the following is NOT TRUE about covalent compounds?

• They have low melting and boiling points.

• They are formed from 2 nonmetals.

• They can conduct electricity when dissolved in water (aqueous).

What set of elements is most likely to form a covalent compound?

• Na and O

• Na and K

• O and C

• Na and Cl

Which element is most likely to form 4 bonds?

• Carbon

• Fluorine

• Sulfur

• Nitrogen

Tags

NGSS.HS-PS1-1

Which of these substances will have the lowest boiling point

• NaCl

• HCl

• KCl

• CaCl₂

Covalent bonds are

• Strong

• Weak

Simple molecular substances have low melting and boiling points because:

• The covalent bond is weak

• Their melting point is low

• There are weak forces between the molecules

• Molecules are always gases