CHM

Which of the following symbol term is incorrect

• 2D

• 6S

• 2P

3Mg+N~>MgN

This is combustion?

• True

• False

The percentage by mass of phosphorus in Na3 PO4

• 11.7%

• 16,9

• 18,9%

• 19,9%

Chemical formulas that indicates the actual numbers and types of atoms in molecule are called

• Molecular formula

• empirical formula

The wave equation is designated with a upper case Greek

• True

• False

The first row in inner transitional elements is called

• Ianthanides

• Actinides

The Atomic number of Na is 12

• false

• True

Br and Hg is the only liquid elements in the Periodic table?

• True

• false

The bonding atomic redius is defined as one-half of the distance between covalently bonded nuclei

• True

• false

Outer shells contains few electrons usually three or fewer

• Metals

• Non-Metals