Ch.4 Atomic Structure

Electrons have a ____________ charge.

The number 80 in the name bromine-80 represents:

Atomic mass is the number of __________________. 

This scientist first proposed the idea of atoms.

Oxidation is the process of ______________ electrons.

The smaller particle of an element to retain its identify is called:

A vertical column on the periodic table is called a 

Isotopes of an element have a different number of _______________.

The atomic number tells the number of ____________.

The weighted average mass of the atoms of an element is called:

This scientist defined the atomic theory. 

This scientist used gold foil to describe the structure of the nucleus. 

What is the mass of one electron? 

What is the mass of one proton? 

Atoms combine in whole number ratios to form compounds. 

The "saying" used to remember reduction and oxidation is ______________.

All elements are composed of atoms. 

Reduction is the process of ______________ electrons.

A horizontal row on the periodic table is called a 

Atoms with an electrical charge are called ____________.

Atoms of different elements are the same.  

Protons have a ____________ charge.

This scientist used a cathode ray tube to prove the electron. 

Neutrons have a ____________ charge.

How do the isotopes hydrogen-2 and hydrogen-3differ?

Defined as 1/12th the mass of one atom of Carbon-12.