Fall 8th Grade Semester Review

Front

Which moon phases are considered 'crescents'?

Back

The crescent moon phases are the Waxing Crescent (Phase 2) and the Waning Crescent (Phase 8).

Front

What is the total number of Hydrogen atoms in the compound 3(NH₄)₂CrO₄?

Back

There are 24 Hydrogen atoms in 3(NH₄)₂CrO₄.

Front

Which type of element is NOT malleable?

Back

Nonmetals are not malleable.

Front

How many Hydrogen atoms are present in 4H₂O?

Back

There are 8 Hydrogen atoms in 4H₂O.

Front

What is the chemical symbol for Lithium?

Back

Li

Front

Define 'malleability' in materials science.

Back

Malleability is the ability of a material to deform under compressive stress, often characterized by the material's ability to form a thin sheet.

Front

What are the phases of the moon in order?

Back

The phases of the moon in order are New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Last Quarter, and Waning Crescent.

Front

What is the chemical formula for Ammonium Chromate?

Back

The chemical formula for Ammonium Chromate is (NH₄)₂CrO₄.

Front

What is the significance of the chemical symbol in chemistry?

Back

Chemical symbols represent elements and are used to write chemical formulas, indicating the types and numbers of atoms in a compound.

Front

Explain the difference between metals and nonmetals.

Back

Metals are typically malleable, ductile, and good conductors of heat and electricity, while nonmetals are usually brittle, not conductive, and can be gases or solids.