Atomic Theory & Structure

What element is this?

Bohr called the regions where electrons orbit around the nucleus

Was the Modern Cloud Theory of electron's energy determining where they can be found developed by MANY scientists?

The mass number of SODIUM is?

What is Beryllium's atomic number?

Which scientist theorized that atoms are positively-charged substances with negatively-charged particles scattered about

What is Beryllium's mass number?

What is the ATOMIC NUMER for Fluorine?

How many neutrons does the most common isotope of BORON have?

What is the average atomic mass of SODIUM?

How many electrons does BORON have?

The atomic number of an element is the same as its number of

What is the positively charged particle in the nucleus of an atom called?

Atoms of the same element with different numbers of neutrons are called?

What element is this a Bohr drawing of?

How many protons does BORON have?

What did Democritus call the smallest part of matter?

Rutherford concluded the center of an atom was dense & positive. What did he say about most of the rest of the atom?

Which scientist developed this model for the atom?