Biology Test # 2

Beschreibung

Chapter 2 sections 1 and 2
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Quiz von alys.caldwell, aktualisiert more than 1 year ago
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Zusammenfassung der Ressource

Frage 1

Frage
The space surrounding the nucleus of an atom contains
Antworten
  • electrons
  • neutrons
  • ions
  • protons

Frage 2

Frage
Which of the following is a use of radioactive isotopes?
Antworten
  • 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

Frage 3

Frage
Which of the following makes up a molecule of water?
Antworten
  • 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

Frage 4

Frage
Which of the following statements about a compound is true?
Antworten
  • 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.

Frage 5

Frage
What type of electron is available to form bonds?
Antworten
  • covalent
  • nucleus
  • valence
  • ionic

Frage 6

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

Frage 7

Frage
The most abundant compound in most living things is
Antworten
  • sodium chloride
  • water
  • sugar
  • carbon dioxide

Frage 8

Frage
When salt is dissolved in water, water is the
Antworten
  • solute
  • solution
  • reactant
  • solvent

Frage 9

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

Frage 10

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

Frage 11

Frage
The nucleus is made of
Antworten
  • protons, neutrons and electrons
  • electrons and neutrons
  • protons and neutrons
  • protons and electrons

Frage 12

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

Frage 13

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

Frage 14

Frage
Water molecules are polar, with
Antworten
  • 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

Frage 15

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

Frage 16

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

Frage 17

Frage
The atomic nucleus of Helium is made of
Antworten
  • only neutrons
  • protons and neutrons
  • electrons and protons
  • only protons

Frage 18

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

Frage 19

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

Frage 20

Frage
An isotope always has
Antworten
  • 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

Frage 21

Frage
Molecules made by SHARING electrons have bonds that are
Antworten
  • metallic
  • hydrogenic
  • covalent
  • ionic

Frage 22

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

Frage 23

Frage
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.
Antworten
  • ionic
  • covalent
  • Van Halen
  • molecular

Frage 24

Frage
Oxygen atoms are non-metals. Which of the following is NOT true of Oxygen?
Antworten
  • 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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