Chemistry final

The nucleus of an atom is ___.

• Has more protons than neutrons

• Negatively charged

• Composed of protons and neutrons

Subatomic particle with no charge

• Proton

• Nucleus

• Atom

• Electron

• Neutron

How many valence electrons do the Alkaline Earth Metals have? They are the second group

• 2

• 4

• 3

• 5

Which category includes most of the elements?

• metals

• nonmetals

• liquids

• gases

In a solution, the substance that causes the dissolving is known as a ________

• solute

• solvent

• suspension

• colloid

Which group of the periodic table is composed of inert (not reactive) gases?

• alkali metals

• alkaline earth metals

• halogens

• noble gases

In a solution, the substance that causes the dissolving is known as a ________

• solute

• solvent

• suspension

• colloid

_________ mixtures are evenly blended and appear to be the same throughout.

• homogeneous

• heterogeneous

The number of electrons in the 2nd principal energy level, n=2, of an atom is:  

• 4

• 2

• 8

• 18

Tags

NGSS.MS-PS1-1

If an atom loses two electrons what charge will it have?

• + 2
•  - 2
• +1
• -1