Atomic Structure

Measure mainly of the nuclear particles: protons + neutrons

• Subatomic Particles

• Atomic Number

• Atomic Mass

• Gluons

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass

• Electron Shells

• Orbitals

• Electron Cloud

• Nucleus

Outside the nucleus of an atom are these

• protons
• neutrons
• quarks
• electrons

How many electrons does Sodium have?

• 11

• 23

• 12

Tags

NGSS.MS-PS1-1

What is the smallest unit of matter? It is composed of protons and neutrons, held together in the nucleus, and electrons around the nucleus in different electron orbitals, which form an electron cloud.

• cell

• nucleus

• atom

• electron

Tags

NGSS.MS-PS1-1

Which TWO particles can be changed within an element without changing what the element is?

• Neutrons

• Electrons

• Protons

The nucleus of an atom is made of

• electrons and protons

• electrons and neutrons

• protons and neutrons

• empty space

How many protons does this atom have?

• 2.5

• 6

• 5

• 10.811

Tags

NGSS.MS-PS1-1

What charge is an proton?