Phys Sci - Unit 2 Pt 2 EC

The electrons that are mainly responsible for an atom's chemical behavior are called the...

• valence electrons

• outside electrons

• core electrons

• main electrons

A positive charged ion...

• is normally a nonmetal

• is called an anion

• is formed when an atom gains electrons

• has more protons than electrons

In order for a neutral atom to become stable, it needs to gain one electrons. Which of the following elements would gain one electron?

• sodium

• magnesium

• carbon

• bromine

Which of the following elements has a +2 oxidation number?

• carbon

• iron

• calcium

• helium

Which of the following statements is correct?

• chlorine gas a +1 oxidation number and wants to gain 1 electron

• potassium has a -1 oxidation number and wants to gain one electron

• sodium has 1 valence electron and has a +1 oxidation number

• boron has 3 valence electrons and has a -3 oxidation number

Which of the following statments is correct?

• metals want to be negatively charged

• nonmetals obtain positive charges to become stable

• nonmentals want to be positivley charged

• nonmetals want to gain electrons

Which of the following elements wants to gain electrons the MOST?

• F

• Rb

• Ar

• Al

Most halogens form compounds by...

• gaining an electron

• losing an electron

• bonding with carbon

• nothing. It is already stable.

Which of the following is an Alkali Metal?

• Hg

• Na

• Mg

• Ne

Which of the following is an alkaline earth metal?

• Na

• Mg

• C

• Ne