March interim review

Rubidium and cesium have similar chemical properties because, in the ground state, the atoms of both elements each have

• 1. one electron in the outermost shell

• 1. two electrons in the outermost shell

• 1. the same amount of total electrons

• two neutrons in the nucleus

Tags

NGSS.HS-PS1-1

Which formula represents a saturated hydrocarbon?

• C₂H₂

• C₂H₄

• C₃H₄

• C₃H₈

Compared to atoms of metals, atoms of nonmetals generally have

• 1. higher electronegativities and lower ionization energies

• 1. higher electronegativities and higher ionization energies

• 1. lower electronegativities and lower ionization energies

• lower electronegativities and higher ionization energies

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

For which element is the radius of its ion larger than the radius of its atom?

• 1. K

• 1. F

• 1. Na

• Ca

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NGSS.HS-PS1-1

How do the atomic radius and metallic properties of sodium compare to the atomic radius and metallic properties of phosphorus?

• 1. Sodium has a larger atomic radius and is more metallic.

• 1. Sodium has a larger atomic radius and is less metallic.

• 1. Sodium has a smaller atomic radius and is more metallic.

• Sodium has a smaller atomic radius and is less metallic.

Tags

NGSS.HS-PS1-1

The graph represents the relationship between temperature and time as heat was added uniformly to a substance starting at a solid below its melting point.

During the BC portion of the curve, the average kinetic energy of the molecules of the substance

• 1. increases and the potential energy increases

• 1. decreases and the potential energy increases

• 1. remains the same and the potential energy increases

• remains the same and the potential energy decreases

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NGSS.HS-PS3-2

NGSS.HS-PS3-4

Which physical changes are endothermic?

• 1. melting and freezing

• 1. melting and evaporating

• 1. condensation and sublimation

• condensation and deposition

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NGSS.MS-PS1-4

Which compound is an isomer of hexane?

• heptane

• ethyl propane

• methyl pentane

• methyl hexane

Every water molecule has two hydrogen atoms bonded to one oxygen atom. This fact supports the concept that elements in a compound are

• 1. chemically combined in a fixed proportion

• 1. chemically combined in proportions that vary

• 1. physically mixed in a fixed proportion

• physically mixed in proportions that vary

Which two particle diagrams each represent a sample of one substance?

• 1. I and II

• 1. I and III

• 1. II and III

• II and IV

Tags

NGSS.HS-PS1-3