Atoms and the Periodic Table

Which of the following has the least mass

What type of element is shinny and is a good conductor?

An atom has 19 protons, 20 neutrons, and 19 electrons. What is the mass number?

An atom has an atomic number 26, mass number 56. How many neutrons are there?

This scientist proposed and named the smallest particle

Elements that have properties of both metals and nonmetals are called

What part of the atom has a negative charge?

Nitrogen and Phosphorus, are in the same group and have the same number of

John Dalton was known for the

Electrons found on the outermost energy level are called

How is the periodic Table arranged?

The region of the atom that contains most of the mass is called

What part of an atom has a positive charge?

What part of an atom has a neutral charge?

Who discovered the plum pudding model?

What is the nucleus made up of?

A vertical column of elements in the periodic table is called a

Which of the following represents an electrically neutral atom?

Most elements in the periodic table are

The number above the symbol on the periodic table is

The chemical properties of an element are determined by

Elements in the same___ often have similar chemical and physical properties

In the "plum pudding" model of the atom, the plums represent

What is the identifying factor of an element?

Most nonmetals are found

This is the region inside the atom where electrons can be found

A horizontal row of elements in the periodic table is called