molecular structure

A material whose particle composition allows heat and electricity to pass through it easily are described as having a high ____.

• conductivity

• density

• hardness

• weight

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Substances are either elements or mixtures.

• True

• False

Which properties describe elements that are nonmetal gases? Select all that apply.

• composed of an extended structure

• composed of individual atoms or diatomic molecules

• high melting point

• low melting point

• strong attractions between particles

Which of the following would be modeled by small particles made up of atoms of two kinds of elements?

• gold

• oxygen

• neon

• water

Tags

NGSS.MS-PS1-1

Which is a property of metals as a result of their extended structures of atoms?

• are poor conductors of electricity

• dissolve in water

• have low melting points

• can be hammered into sheets

Tags

NGSS.MS-PS1-1

A substance has an extended structure composed of two different elements. The elements are a metal and a nonmetal. Which property would this substance most likely have?

• can be hammered into sheets

• has a high melting point

• does not dissolve in water

• is a gas at room temperature

Tags

NGSS.MS-PS1-1

Because they have an extended structure, elements that are __ tend to be in the __ state at room temperature.

• metal; solid

• metal; liquid

• nonmetal; solid

• nonmetal; gas

Tags

NGSS.MS-PS1-1

Why does oil not dissolve in water?

• Oil is an extended structure, and water is made of polar molecules.

• Oil is an extended structure, and water is made of nonpolar molecules.

• Oil is made of nonpolar molecules, and water is made of polar molecules.

• Oil is made of polar molecules, and water is made of nonpolar molecules.

Tags

NGSS.MS-PS1-1

The forces of attraction between the particles of a matter sample are strong and draw particles together, keeping them in their place. This is an example  _____.

• of the liquid state of matter

• of the solid state of matter

• of superficial tension

• of viscosity

In a chemical formula, the number of each type of atom in the compound is shown with numbers that are ____.

• superscripts

• chemical symbols

• oxidation numbers

• subscripts

Tags

NGSS.MS-PS1-1