Protons and Neutrons are held in the _______.

________ have a positive+ charge.

________ have a negative- charge.

________ have neither a positive nor negative charge, they are considered neutral.

An _________ is matter that is composed of one type of atom.

The symbol for the Neon element would be written as this...

Electron energy levels can only hold a specific amount of electrons. Energy level 1 can hold how many electrons?

Energy levels in an atom can only hold a specific amount of electrons. Energy level 2 can hold up to how many electrons?

Electron energy levels can only hold a specific amount of electrons. Energy level 3 can hold up to how many electrons?

Sodium (Na) has an atomic number of 11. How many electrons will be placed in the second energy level?

Sodium (Na) has an atomic number of 11. How many electrons will be placed in the third energy level?

Sodium (Na) has an atomic number of 11. How many electrons will be placed in the first energy level?

Sodium (Na) has an atomic number of 11. How many electrons will be placed in the third energy level?

What is a major element found in eggs?

What is a major element found in batteries?

What is a major element found in bones?

Which elements are magnetic?

Argon (Ar) is atomic number 18, it has 18 protons and 18 electrons, the atomic mass is 39.948. How many neutrons does Argon have?

Beryllium (Be) is atomic number 4, it has 4 protons and 4 electrons, the atomic mass is 9.0122. How many neutrons does Beryllium have?