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