Chemistry 8P11 - Atomic Structure

Question 1

Define:

★Atomic Nucleus

Answer 1

The atomic nucleus is a small central region containing protons and neutrons surrounded by a larger region containing electrons.

Question 2

Define:

★Proton (p⁰)

Answer 2

A proton is a positively charged particle in the nucleus that determines the identity of the substance/material.

Question 3

Define:

★Neutron (n⁰)

Answer 3

A neutron is a neutral particle located in the nucleus.

Question 4

Define:

★Electron (e^-)

Answer 4

An electron is a negative particle located outside the nucleus.

Question 5

Define:

★Valence Electron

Answer 5

Valence electrons are the electrons in the outermost shell, or energy level, of an atom.

Question 6

Define:

Isotope

Answer 6

Isotopes are different forms of an element (same number of p+), varying numbers of n⁰ (ex: C-14)