Chem Final Quiz

The electron cloud has which correct characteristic?

• it is positively charged

• contains nearly all of the atom’s mass

• it is divided into energy levels

• contains very little of the atom’s volume

Identify that element with the following electron configuration: 1s²2s²2p⁵.

• Be

• Si

• C

• F

Tags

NGSS.HS-PS1-1

Identify the best electron configuration for germanium:

• [Ne]3s²3p⁶4s²3d¹⁰4p²

• [Ar]4s²3d¹⁰4p²

• [Ar]4s²3d¹⁰4p³

• [Ne]3s²3d¹⁰3p²

Tags

NGSS.HS-PS1-1

Nonmetals will _____ in reactivity as you move up and right. Metals will ______ in reactivity as you move down and left in the periodic table.

• increase; increase

• decrease; increase

• increase; decrease

• decrease; decrease

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Two atoms bond together, having a difference in electronegativity of 2.1. What type of bond will they most likely form?

• covalent

• polar covalent

• ionic

• they will not form a bond

Two oxygen atoms have a difference in electronegativity of 0. What type of bond will they form?

• covalent

• polar covalent

• ionic

• they will not form a bond

How many significant figures are in the measurement 0.10300 g?

• 2

• 3

• 4

• 5

The speed of light is 299792458 m/s. Changing this number to scientific notation and rounding the number to 4 significant figures gives:

• 0.2998 x 10⁹ m/s

• 2.9979 x 10⁸ m/s

• 2.998 x 10⁸ m/s

• 3.000 x 10⁸ m/s

Matter with an indefinite shape and definite volume would be considered a ________.

• solid

• liquid

• gas

• plasma

Tags

NGSS.MS-PS1-4

You are given a container filled with water and table salt that has already been stirred. You can only separate the salt from the water by boiling off the water. This makes this a ________.

• homogenous mixture

• compound

• heterogenous mixture

• solution

Tags

NGSS.MS-PS3-4