Atomic Structure - Spring, 2023

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

• Electron Shells
• Orbitals
• Electron Cloud
• Nucleus

Arrangement of elements organized by atomic number

• Electron Cloud 
• Periodic Table 
• Electron Configuration
• None of these

Calculation used to find the number of neutrons in an atom

• Mass Number- Atomic Number

• Atomic Number - Mass Number

• Mass Number - Electrons

• protons = electrons = neutrons

Atoms of the same element must always have the same number of _________

• electrons
• neutrons
• isotopes
• protons

Most of the mass in an atom is made up of _____________________?

• protons and electrons
• protons and neutrons
• neutrons and electrons
• electrons and quarks

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

DIFFERENT kinds of atoms chemically combined to form a substance are

• Mixture
• Element
• Compound
• Substance

The mass number of an isotope is equal to the number of ______ in an atom.

• Protons
• Neutrons
• Protons + Neutrons
•  Electrons

Which subatomic particle determines the charge of an atom?

• protons

• neutrons

• electrons

Which subatomic particle determines the identity of an element?

• protons

• neutrons

• electrons