Element Builder- Gizmos

Pure substances that are made up of one kind of atom

Tiny particles of matter that are made up of three particles: protons, neutrons, and electrons

In the center of the atom, called the nucleus

Protons and neutrons

Electrons

The number of protons that you add

Subtract the atomic number from the mass number

Atoms of the same element that have different numbers of neutrons

An alternative form of an element. Each isotope of an element has the same number of protons, but a different number of neutrons

No, some are, while others are radioactive, which means the atoms decay over time and emit radiation

Carbon-12 and carbon-13

Nitrogen-14 and nitrogen-15

Oxygen-15 and oxygen-19

Three

Thirteen

Twelve

Ten

10

In shells around the nucleus. The first orbit has two electrons, and the following ones have eight

A model of an atom in which each dot represents a valence electron

They are sorted according to mass, and groups they are in. (Orbits increase as you move down the rows, and valence electrons increase s you move right

By atomic number. They are organized left to right and top to bottom by atomic number. Left to right by the number of valence electrons. Top to bottom by number of orbitals

Start at three, then continue clockwise

All except for helium have the same electron dot diagram if they are in the same column