Bio 2nd Q Exam Question Preview (ID: 45546)


Chem Questions. TEACHERS: click here for quick copy question ID numbers.

What type of bond occurs when atoms transfer electrons?
a) Covalent
b) Chemistry
c) Lipids
d) Ionic

Which bond occurs when atoms share electrons?
a) Covalent
b) Ionic
c) Chemistry
d) Super!

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

What is the atomic mass of Helium?
a) 2
b) 4.00
c) 2.34
d) 7.94

An electron has what type of charge?
a) positive
b) negative
c) neutral
d) radioactive

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

What is found in the nucleus?
a) Electrons and neutrons
b) Protons and electrons
c) Protons and neutrons
d) Only protons

Mass number tells you how many_______ is in the nucleus
a) electrons and neutrons
b) Electrons and protons
c) protons and neutrons
d) Neutrons

Atomic number tells you how many_______an atom has
a) protons and electrons
b) neutrons
c) protons and neutrons
d) neutrons and electrons

What is the element symbol for Helium?
a) He
b) H
c) HE
d) Em

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

If an atom has 17 protons and 18 neutrons, its atomic number would be
a) 1
b) 18
c) 35
d) 17

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

What is the mass number of an atom with 5protons, 6 neutrons, and 5 electrons
a) 5
b) 6
c) 11
d) 16

What is found in the nucleus of an atom?
a) protons and neutrons
b) protons only
c) neutrons only
d) electrons only

What are found in the space surrounding the nucleus of an atom?
a) protons
b) electrons
c) neutrons
d) protons and neutrons

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.

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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