Basic Chemistry

Match the following

• Hydrogen

• H

• Oxygen

• O

• Phosphorus

• N

• Nitrogen

• P

• Carbon

• C

The valence of an atom is its

• The number of neutrons required by an element to become perfect in everyway

• The total number of protons required to satify the octet rule

• The total number of electron needed by an atom to satisfy the octet rule

• Combining power of an element, the number of electrons needed to give, take or share to satify the octet rule

Covalent bonds form when

• non-metals react together to share electrons to achieve the octet rule

• non-metals react together to form ions and achieve the octet rule

• non-metals react with metals to share electrons

• metals react to share electrons to achieve the octet rule

Tags

NGSS.MS-PS1-5

What is the ratio of hydrogen to oxygen in H2O

• 1:2

• 2:1

• 1:1

• 1:3

Tags

NGSS.MS-PS1-1

The atomic number of an element is

• The number of neutrons in the nucleus

• The number of electrons in an ion of that element

• the number of protons in the nucleus

• The number of protons and neutrons in the nucleus

What is an ion?

• It is formed when an atom donates a proton

• It is formed when a nucleus donates a neutron

• It is formed when an atom donates or accepts an electron

• It is formed when an atom shares electrons

Tags

NGSS.MS-PS1-5

What is the valence number of the Halogens

• 6

• -1

• +1

• 5

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Ionic bonds are formed

• When non-metals react together to form solids

• When 2 metals react together to achieve the octet rule

• When metals react with non-metals and ions are formed

• When transition metals react together

The elements in Group 8 are called

• alkali metals

• noble gases

• halogens

• alkaline earth metals

Are Noble gases very reactive

• sometimes

• No

• Very reactive

• yes