Unit 4 Practice Test

Uranium emits a type of radiation that does not penetrate human skin, but can be harmful if it gets inside body cells. This type of emission is ______ radiation.

• alpha

• beta

• gamma

• neutron

Tags

NGSS.HS-PS1-8

Iron (Fe) is an effective conductor of heat and electricity. An element that most likely to have similar conductivities.

• Oxygen

• Potassium

• Nitrogen

• Neon

Tags

NGSS.HS-PS1-1

A Lewis dot diagram shows the shape of a water molecule and the locations of the electrons. Select the term below that describe a water molecule as illustrated by the dot structure.

• Linear

• Bent

• Tetrahedral

• Trigonal Planar

Tags

NGSS.HS-PS2-6

A Lewis dot diagram shows the shape of a water molecule and the locations of the electrons. Select the term below that describe a water molecule as illustrated by the dot structure.

• Ionic

• Nonpolar

• Polar

Tags

NGSS.HS-ESS2-5

If the atomic mass of a fluorine is 19, how many neutrons are in the nucleus?

• 19

• 9

• 10

• 1

Tags

NGSS.HS-PS1-8

If an atom has nine protons and ten electrons, then the atom is

• neutral

• positively charged

• negatively charged

• radioactive

Tags

NGSS.MS-PS1-1

Based on the positions of the elements on the periodic table, what is the chemical formula of aluminum sulfide?

• Al3S2

• AlS

• AlS3

• Al2S3

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Use the electron dot formula of beryllium chloride to predict its molecular shape.

• tetrahedral

• linear

• bent

• t. pyramidal

Tags

NGSS.HS-PS1-1

In covalent bonds, electrons are ___________.

• transferred
• gained
• lost
• shared

What geometry will this molecular structure have?: H₂S

• bent
• tetrahedral
• linear
• trigonal pyramidal