Quiz
Biology Test # 2
Perguntas do quiz (24)
1The space surrounding the nucleus of an atom contains
- Aelectrons
- Bneutrons
- Cions
- Dprotons
2Which of the following is a use of radioactive isotopes?
- Acan determine the ages of rocks and fossils
- Bused as "tracers" to follow the movements of substances within organisms
- Ccan be used to treat cancer and kill bacteria that cause food to spoil
- Dall of the above
3Which of the following makes up a molecule of water?
- Aone atom of hydrogen and one atom of oxygen
- Btwo atoms of hydrogen and one atom of oxygen
- Cone atom of hydrogen and two atoms of oxygen
- Done atom of sodium and one atom of chlorine
4Which of the following statements about a compound is true?
- AOnly the chemical properties of a compound are usually the same as those of the elements from which it is formed.
- BThe physical and chemical properties of a compound are usually very different from those of the elements from which it is formed.
- COnly the physical properties of a compound are usually the same as those of the elements from which it is formed.
- DThe physical and chemical properties of a compound are usually the same as those of the elements from which it is formed.
5What type of electron is available to form bonds?
- Acovalent
- Bnucleus
- Cvalence
- Dionic
6What type of ion forms when an atom loses electrons?
- Apositive
- Bpossibly positive or negative
- Cneutral
- Dnegative
7The most abundant compound in most living things is
- Asodium chloride
- Bwater
- Csugar
- Dcarbon dioxide
8When salt is dissolved in water, water is the
- Asolute
- Bsolution
- Creactant
- Dsolvent
9A substance with a pH of 6 is called
- Aneither an acid nor a base
- Ban acid
- Cboth an acid and a base
- Da base
10The three particles that make up an atom are
- Aneutrons, isotopes and electrons
- Bprotons, neutrons and isotopes
- Cprotons, neutrons and electrons
- Dpositives, negatives and electrons
11The nucleus is made of
- Aprotons, neutrons and electrons
- Belectrons and neutrons
- Cprotons and neutrons
- Dprotons and electrons
12Isotopes are atoms of the same element with the same number of protons and
- Athe same number of neutrons
- Ba different number of molecules
- Ca different number of neutrons
- Da different number of electrons
13Which of the following terms describes a substance formed by the combination of two or more elements in definite proportions?
- Aisotope
- Bcompound
- Cenzyme
- Dnucleus
14Water molecules are polar, with
- Athe oxygen side being slightly negative and the hydrogen side being slightly positive
- Bthe oxygen and hydrogen sides being slightly positive
- Cthe oxygen side being slightly positive and the hydrogen side being slightly negative
- Dthe oxygen and hydrogen sides being slightly negative
15A solution is a(an)
- Aevenly distributed mixture of two or more substances
- Bcombination of two or more liquids
- Cchemical reaction
- Dbreaking of a chemical bond
16The word "atom" comes from the Greek "atomos" and the Greek word literally means
- Ato spray a mist
- Bnucleus
- Ccannot be cut
- Ddog particle
17The atomic nucleus of Helium is made of
- Aonly neutrons
- Bprotons and neutrons
- Celectrons and protons
- Donly protons
18Carbon-14 weighs 14 AMUs. Since Carbon has 6 protons, Carbon-14 must have
- A7 neutrons
- B6 neutrons
- C8 neutrons
- D14 neutrons
19Oxygen has 8 protons, therefore Oxygen atoms will normally have
- A14 neutrons
- B8 electrons around it
- C6 neutrons
- Datomic mass of 8
20An isotope always has
- Asame number of protons, different neutrons
- Bsame number of neutrons, different protons
- Csame number of neutrons, different number of electrons
- Dsame number of protons and neutrons
21Molecules made by SHARING electrons have bonds that are
- Ametallic
- Bhydrogenic
- Ccovalent
- Dionic
22According to your reading assignment, the forces that bond two separate molecules together are called _______ forces.
- AVan Halen
- Bionic
- Cvan der Waals
- Dintramolecular
23According 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.
- Aionic
- Bcovalent
- CVan Halen
- Dmolecular
24Oxygen atoms are non-metals. Which of the following is NOT true of Oxygen?
- AIt has 2 openings in valence
- BIt has only 6 protons in its nucleus
- CIt bonds ionically with reactive metals
- DIt bonds covalently with hydrogen
Informações
- Descrição
- Chapter 2 sections 1 and 2
- Autor
- alys.caldwell
- Idioma
- English
- Visualizações
- 37
- Etiquetas
- Avaliação
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