Isotopes Worksheet - Type shit
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SUBATOMIC PARTICLES and ISOTOPES WORKSHEET
Complete the following table using the information discussed in class and your Periodic
Table. All atoms are neutral.
Element
Name
Atomic
Number
Mass
Number
Number
of
protons
Number
of
neutrons
Number
of
electrons
Isotopic
notation
oxygen 17
15 31
38 50
neon 20
10 9
79 118
Identify the neutral atom described by name and mass number (i. oxygen-16).
1) The atom with 2 neutrons and 1 proton is ____________________.
2) The atom with 17 electrons and 18 neutrons is _________________.
3) The atom with 6 protons and 8 neutrons is __________________.
Answer each of the following using your knowledge of chemistry and the Periodic Table.
4) An atom contains 55 protons. What is the element symbol? ____________
5) An atom contains 31 protons, 39 neutrons and 31 electrons.
Identify the mass number of this atom. _______________
6) What is the atomic number of bromine? ____________
7) What is the number of total subatomic particles in an atom of B-11? _____
8) What is the atomic number of Zn-65? ____________
9) How many neutrons are in an atom of Hg - 201? __________
Number of
PI Number of E
Phosphorus
15 16 IS IP
strontium 88 38 38 885
10 10 10 10 Ne
Fluorine 9 19 9 15
Gold 79 197 79 1aAu
hydrogen 3
Chlorine 35
Carbon 14
es
Mass numbers neutrons protons
70
35
16
30
121
10) All atoms of the same element must contain the same number of
(A) protons
(B) neutrons
(C) electrons plus protons
(D) protons plus neutrons
11) What is the total number of protons in a nucleus of magnesium-23?
(A) 23 (B) 11 (C) 12 (D) 16
12) Isotopes of a given element contain
(A) Same number of neutrons but different number of protons
(B) Same number of neutrons and protons
(C) Same number of protons but a different number of neutrons
(D) Same number of protons but a different number of electrons
13) An atom with 29 protons and 36 neutrons is an isotope of
(A) Si (B) Cu (C) Kr (D) Cl
14) Carbon exists as three naturally occurring isotopes: C-12, C-13 and C-14. As the
number of neutrons increase in the isotope, the nuclear charge
(A) increases
(B) decreases
(C) remains the same
15) An atom of an element is electrically neutral because the
(A) Number of protons equals the number of electrons
(B) Number of protons equals the number of neutrons
(C) Number of neutrons equals the number of electrons
16) What is the nuclear charge of an atom of nitrogen-14?
(A) +
(B) +
(C) 0
(D) +
17) Calculate the average atomic mass of chromium, given the following percent
abundances and isotope masses: 4 % 49 amu; 83% 51 amu;
9% 52 amu and 2% 53 amu
O
O
O
O
g
neutrons neutral
charge
o
NO effect
Neutrals Proton selection
O
0 49 60 51.
0 52 0 53.
2 17265177643 5 11.
51.
524
1
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Isotopes Worksheet - Type shit
Course : General Chemistry I (CHE 1201)
Students shared 17 documents in this course
University : St. Francis College
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SUBATOMIC PARTICLES an d ISOTOPES WORKSHEET
Complete the followin g table using the information discus sed in class and your Periodic
Table. All atoms are neutral.
Identify the neutral atom described by name and mass number (i.e. oxygen -16).
1) The atom with 2 neutrons and 1 proton is ____________________.
2) The atom with 17 electrons and 18 neutrons is _________________.
3) The atom with 6 protons and 8 neutrons is __________________.
Answer each of the followin g using your kno wledge of ch emistry and the Periodic Table.
4) An atom contains 55 protons. What is the element symbol? ____________
5) An atom contains 31 protons, 39 neutrons and 31 electrons.
Identify the mass number of this atom. _______________
6) What is the atomic number of bromine? ____________
7) What is the number of total subatomi c particles in an atom of B-11? _____
8) What is the atomic number of Zn-65? ____________
9) How many neutrons are in an atom of Hg - 201? __________
