6.6a

The word “luster” refers to which property of matter?

• The ability to conduct electrical or thermal energy

• Capable of being drawn out into thin wires

• The way a surface appears when it reflects light

• Suitable for being shaped by beating or rolling

Silicon is a semiconductor and has properties of both metals and nonmetals. What type of element is Silicon?

• Metal

• Nonmetal

• Metalloid

• Pretty

John was observing the physical properties of elements in order to classify them as either a metal, nonmetal, or metalloid. The first element was dull, brittle, and did not conduct heat. What is the element most likely classified as?

• metal

• nonmetal

• metalloid

Elizabeth was examining elements and their physical properties. She described an element is her science journal as having no shine, an insulator, and very brittle. What would this element be classified as?

• metal

• nonmetal

• metalloid

If a material can easily be drawn into the shape of a wire, it is

• Ductile

• Magnetic

• Malleable

• Reactive

If a substance is magnetic it is most likely a

• metal

• nonmetal

• metalloid

Tags

NGSS.MS-PS2-3

Which statement does NOT correctly compare boron with another element?

• Boron is less malleable than iron.

• Boron is a solid at room temperature, but neon is a gas.

• Boron is a better conductor of electricity than fluorine.

• Boron conducts electricity as well as silver does.

What determines the reactivity of an element?

• Size of its nucleus

• Number of total electrons

• Number of valence electrons

• Number of shells

Based on the information in the table, which conclusion about the chemical reactivity of these elements is valid?

• Boron is the most reactive because it has the most protons.

• Fluorine is the most reactive because it has 7 electrons in the outer shell.

• Silicon is the most reactive because it has an equal number of protons and neutrons.

• Gallium is the most reactive because it has many more neutrons than protons.

Tags

NGSS.MS-PS1-1

A student is studying the ways different elements are similar to one another. Diagrams of atoms from four different elements are shown in the image.

Which two atoms are of elements in the same group in the periodic table?

• Atom 1 and Atom 2

• Atom 1 and Atom 4

• Atom 2 and Atom 3

• Atom 3 and Atom 4

Tags

NGSS.MS-PS1-1