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Biology Test # 2

Description

Chapter 2 sections 1 and 2
alys.caldwell
Quiz by alys.caldwell, updated more than 1 year ago
alys.caldwell
Created by alys.caldwell almost 9 years ago
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Resource summary

Question 1

Question
The space surrounding the nucleus of an atom contains
Answer
  • electrons
  • neutrons
  • ions
  • protons

Question 2

Question
Which of the following is a use of radioactive isotopes?
Answer
  • can determine the ages of rocks and fossils
  • used as "tracers" to follow the movements of substances within organisms
  • can be used to treat cancer and kill bacteria that cause food to spoil
  • all of the above

Question 3

Question
Which of the following makes up a molecule of water?
Answer
  • one atom of hydrogen and one atom of oxygen
  • two atoms of hydrogen and one atom of oxygen
  • one atom of hydrogen and two atoms of oxygen
  • one atom of sodium and one atom of chlorine

Question 4

Question
Which of the following statements about a compound is true?
Answer
  • Only the chemical properties of a compound are usually the same as those of the elements from which it is formed.
  • The physical and chemical properties of a compound are usually very different from those of the elements from which it is formed.
  • Only the physical properties of a compound are usually the same as those of the elements from which it is formed.
  • The physical and chemical properties of a compound are usually the same as those of the elements from which it is formed.

Question 5

Question
What type of electron is available to form bonds?
Answer
  • covalent
  • nucleus
  • valence
  • ionic

Question 6

Question
What type of ion forms when an atom loses electrons?
Answer
  • positive
  • possibly positive or negative
  • neutral
  • negative

Question 7

Question
The most abundant compound in most living things is
Answer
  • sodium chloride
  • water
  • sugar
  • carbon dioxide

Question 8

Question
When salt is dissolved in water, water is the
Answer
  • solute
  • solution
  • reactant
  • solvent

Question 9

Question
A substance with a pH of 6 is called
Answer
  • neither an acid nor a base
  • an acid
  • both an acid and a base
  • a base

Question 10

Question
The three particles that make up an atom are
Answer
  • neutrons, isotopes and electrons
  • protons, neutrons and isotopes
  • protons, neutrons and electrons
  • positives, negatives and electrons

Question 11

Question
The nucleus is made of
Answer
  • protons, neutrons and electrons
  • electrons and neutrons
  • protons and neutrons
  • protons and electrons

Question 12

Question
Isotopes are atoms of the same element with the same number of protons and
Answer
  • the same number of neutrons
  • a different number of molecules
  • a different number of neutrons
  • a different number of electrons

Question 13

Question
Which of the following terms describes a substance formed by the combination of two or more elements in definite proportions?
Answer
  • isotope
  • compound
  • enzyme
  • nucleus

Question 14

Question
Water molecules are polar, with
Answer
  • the oxygen side being slightly negative and the hydrogen side being slightly positive
  • the oxygen and hydrogen sides being slightly positive
  • the oxygen side being slightly positive and the hydrogen side being slightly negative
  • the oxygen and hydrogen sides being slightly negative

Question 15

Question
A solution is a(an)
Answer
  • evenly distributed mixture of two or more substances
  • combination of two or more liquids
  • chemical reaction
  • breaking of a chemical bond

Question 16

Question
The word "atom" comes from the Greek "atomos" and the Greek word literally means
Answer
  • to spray a mist
  • nucleus
  • cannot be cut
  • dog particle

Question 17

Question
The atomic nucleus of Helium is made of
Answer
  • only neutrons
  • protons and neutrons
  • electrons and protons
  • only protons

Question 18

Question
Carbon-14 weighs 14 AMUs. Since Carbon has 6 protons, Carbon-14 must have
Answer
  • 7 neutrons
  • 6 neutrons
  • 8 neutrons
  • 14 neutrons

Question 19

Question
Oxygen has 8 protons, therefore Oxygen atoms will normally have
Answer
  • 14 neutrons
  • 8 electrons around it
  • 6 neutrons
  • atomic mass of 8

Question 20

Question
An isotope always has
Answer
  • same number of protons, different neutrons
  • same number of neutrons, different protons
  • same number of neutrons, different number of electrons
  • same number of protons and neutrons

Question 21

Question
Molecules made by SHARING electrons have bonds that are
Answer
  • metallic
  • hydrogenic
  • covalent
  • ionic

Question 22

Question
According to your reading assignment, the forces that bond two separate molecules together are called _______ forces.
Answer
  • Van Halen
  • ionic
  • van der Waals
  • intramolecular

Question 23

Question
According to your textbook, if an element steals an electron from a weaker element making them both charged particles that attract each other because of opposite charges, this bonding between the elements is called _________ bonding.
Answer
  • ionic
  • covalent
  • Van Halen
  • molecular

Question 24

Question
Oxygen atoms are non-metals. Which of the following is NOT true of Oxygen?
Answer
  • It has 2 openings in valence
  • It has only 6 protons in its nucleus
  • It bonds ionically with reactive metals
  • It bonds covalently with hydrogen
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