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Bio 2nd Q Exam
Test Description: Chem questions
Instructions: Answer all questions to get your test result.
1) The three particles that make up atoms are
A
protons, neutrons, and electrons.
B
positives, negatives, and neutrals.
C
protons, neutrons, and isotopes.
D
neutrons, isotopes, and electrons.
2) What are found in the space surrounding the nucleus of an atom?
A
protons
B
electrons
C
neutrons
D
protons and neutrons
3) What is found in the nucleus of an atom?
A
electrons only
B
neutrons only
C
protons only
D
protons and neutrons
4) What is the mass number of an atom with 5protons, 6 neutrons, and 5 electrons
A
5
B
11
C
6
D
16
5) Oxygen 16 has a mass number of 16. Oxygen 18 has a mass number of 18. How would you describe these two?
A
two different elements
B
isotopes
C
molecules
D
ions
6) If an atom has 17 protons and 18 neutrons, its atomic number would be
A
35
B
17
C
18
D
1
7) Which of the following is a substance formed by the chemical joining of two or more elements in definite amounts?
A
isotope
B
enzyme
C
atomic number
D
compound
8) What is the element symbol for Helium?
A
He
B
HE
C
H
D
Em
9) Atomic number tells you how many_______an atom has
A
neutrons
B
protons and electrons
C
neutrons and electrons
D
protons and neutrons
10) Mass number tells you how many_______ is in the nucleus
A
Neutrons
B
Electrons and protons
C
protons and neutrons
D
electrons and neutrons
11) What is found in the nucleus?
A
Protons and neutrons
B
Protons and electrons
C
Only protons
D
Electrons and neutrons
12) which 2 particle combinations would make a neutral atom?
A
a proton and a neutron
B
an electron and a neutron
C
a proton and an electron
D
2 protons
13) An electron has what type of charge?
A
radioactive
B
positive
C
negative
D
neutral
14) What is the atomic mass of Helium?
A
2.34
B
2
C
7.94
D
4.00
15) What are isotopes?
A
When two of the same element have a different number of neutrons
B
When two of the same element have a different number of protons
C
When two elements are different from each other
D
When two elements have the same atomic mass
16) Which bond occurs when atoms share electrons?
A
Ionic
B
Covalent
C
Super!
D
Chemistry
17) What type of bond occurs when atoms transfer electrons?
A
Covalent
B
Chemistry
C
Lipids
D
Ionic
18) How many atoms of Hydrogen are in H2O?
A
1
B
4
C
2
D
3
19) Element A has an atomic number of 8 and an atomic mass of 16. Element B has an atomic number of 8 and mass number of 17. Are they isotopes or different elements
A
Different elements: Same number of protons, different neutrons
B
Isotopes: Same number of protons, different neutrons
C
Different elements: Different atomic number, same atomic mass
D
Isotopes: Different atomic number, same atomic mass
20) How many Protons does Lithium have?
A
4
B
6.94
C
7
D
3
*select an answer for all questions
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