Periodic table

nuetrons have a __________ charge

These exhibits properties of both metals and nonmetals

Elements in group 17 are called

Which of the following elements is a noble gas?

protons have a __________ charge

H2O is a

Na is the symbol for

Who discovered electrons?

This element has 49 protons

What element is the only nonmetal that is placed on the lefthand side of the periodic table

Horizontal columns on the periodic table are referred to as

Water is a

Electrons have a ___________ charge

Vertical columns on the periodic table are referred to as

How is an atom's atomic mass determined?

Which was discovered last?

Who discovered neutrons?

Group 18 is called

The atomic number refers to how many________an atom of that element has.

Which was discovered first?

This group of elements reacts violently with water

Barium is a

Atomos means

All of the following are properties of metals EXCEPT

Which of the following elements is a transition metal?