1. Atomic Structure

Question 1

Describe an atom

Answer 1

atoms are mostly empty space surrounding a very small, dense nucleus that contains protons and neutrons; electrons are found in shells in the empty space around the nucleus

Question 2

describe subatomic particles- protons, neutrons and electrons in terms of their relative charges and relative masses

Answer 2

mass- 1, 1, 1/1836
charge- +1, 0, -1

Question 3

Explain the terms atomic and proton number; mass and nucleon number

Question 4

describe the distribution of mass and charge within an atom

Question 5

describe the behavior of beams of protons, neutrons and electrons moving at the same velocity in an electric field

Question 6

determine the numbers of protons, neutrons and electrons present in both atoms and ions given atomic or proton number, mass or nucleon number and charge

Question 7

define the term isotope and its notation

Question 8

state and explain qualitatively the variations in atomic radius and ionic radius across a period and down a group

Question 9

state that and explain why isotopes of the same element have the same chemical properties

Question 10

state that and explain why isotopes of the same element have different physical properties, limited to mass and density