Bio 2nd Q Exam Question Preview (ID: 45546)
Chem Questions.
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The three particles that make up atoms are
a) protons, neutrons, and isotopes.
b) neutrons, isotopes, and electrons.
c) positives, negatives, and neutrals.
d) protons, neutrons, and electrons.
What are found in the space surrounding the nucleus of an atom?
a) protons
b) electrons
c) neutrons
d) protons and neutrons
What is found in the nucleus of an atom?
a) protons and neutrons
b) protons only
c) neutrons only
d) electrons only
What is the mass number of an atom with 5protons, 6 neutrons, and 5 electrons
a) 5
b) 6
c) 11
d) 16
Oxygen 16 has a mass number of 16. Oxygen 18 has a mass number of 18. How would you describe these two?
a) isotopes
b) two different elements
c) molecules
d) ions
If an atom has 17 protons and 18 neutrons, its atomic number would be
a) 1
b) 18
c) 35
d) 17
Which of the following is a substance formed by the chemical joining of two or more elements in definite amounts?
a) isotope
b) compound
c) enzyme
d) atomic number
What is the element symbol for Helium?
a) He
b) H
c) HE
d) Em
Atomic number tells you how many_______an atom has
a) protons and electrons
b) neutrons
c) protons and neutrons
d) neutrons and electrons
Mass number tells you how many_______ is in the nucleus
a) electrons and neutrons
b) Electrons and protons
c) protons and neutrons
d) Neutrons
What is found in the nucleus?
a) Electrons and neutrons
b) Protons and electrons
c) Protons and neutrons
d) Only protons
which 2 particle combinations would make a neutral atom?
a) 2 protons
b) an electron and a neutron
c) a proton and a neutron
d) a proton and an electron
An electron has what type of charge?
a) positive
b) negative
c) neutral
d) radioactive
What is the atomic mass of Helium?
a) 2
b) 4.00
c) 2.34
d) 7.94
What are isotopes?
a) When two elements have the same atomic mass
b) When two elements are different from each other
c) When two of the same element have a different number of protons
d) When two of the same element have a different number of neutrons
Which bond occurs when atoms share electrons?
a) Covalent
b) Ionic
c) Chemistry
d) Super!
What type of bond occurs when atoms transfer electrons?
a) Covalent
b) Chemistry
c) Lipids
d) Ionic
How many atoms of Hydrogen are in H2O?
a) 2
b) 1
c) 4
d) 3
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: Same number of protons, different neutrons
c) Isotopes: Different atomic number, same atomic mass
d) Different elements: Different atomic number, same atomic mass
How many Protons does Lithium have?
a) 6.94
b) 4
c) 3
d) 7
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