Date ______ Atomic Structure Worksheet 1 BHS Chemistry

Date ______ Atomic Structure Worksheet 1 BHS Chemistry

KEY
Date __________
BHS Chemistry
Atomic Structure Worksheet 1
Directions:
Complete the table using your knowledge of the atom.
Sub-atomic particle
Charge
Location
Mass (AMU)
Proton
Positive
Nucleus
1 amu
Neutron
No Charge or
Neutral
Nucleus
1 amu
Electron
Negative
Outside nucleus in
energy orbitals
0 amu
Directions:
Answer the following questions based on atomic structure.
1) Atomic number = Number of protons in an atom’s nucleus.
2) Atomic Mass = Number or protons and neutrons in an atom’s nucleus.
3) Charge of an atom = Neutral (number of protons = number of electrons).
4) Charge of an atom’s nucleus = Positive because of the protons.
Directions:
Use the following diagram to identify the following:
Number of protons: 3
Number of electrons: 3
Number of neutrons: 3
Atomic number: 3 (there are 3 protons)
Atomic mass: 6 amu
Element: Li or lithium
Directions:
Complete the following table based on your knowledge of the atom.
Element
Atomic
Mass
Number of
Number of
Number
Number
Protons
Neutrons
Mass # – Atomic #
Zn
30
65
30
35
Number of
Electrons
30
C
6
12
6
6
6
Ca
20
40
20
20
20
S
16
32
16
16
16
Directions:
Answer the following questions based on atomic structure.
 What is the atomic number of titanium (Ti)? 22
 How many protons does an atom of Ti have? 22
 How many electrons does an atom of Ti have? 22
Explain why atoms are electrically neutral in terms of protons and electrons.
Atoms are electrically neutral because they have the same number of positively
charged particles (protons) and negatively charged particles (electrons).
Directions:
From the Isotopic notation for the following elements, identify the mass number,
atomic number, number of protons, number of neutrons, and number of electrons.
12
6C
35
17Cl
Mass Number 12 amu
Mass Number 35 amu
Atomic Number 6
Atomic Number 17
p+ = 6, n = 6, e- = 6
p+ = 17, n= 18, e- = 17