Test
Unit 4 Physical Science
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Preguntas del test (24)
1The basic building block of matter is the ______.
- Aatom
- Bproton
- Cneutron
- Delectron
2Which of the following has a negative charge?
- Anucleus
- Bprotons
- Cneutrons
- Delectrons
3Which of the following is the smallest in mass?
- Anucleus
- Bproton
- Cneutron
- Delectron
4The atomic model that describes an atom as a spherical object containing a certain number of electrons trapped in a mass of positive charge is often called the _______ model.
- Aelectron cloud
- Braisin bread
- Cmolecular
- Dnuclear
5The first nucleus of an atom was shown as _________.
- Aa mass of protons and neutrons
- Ba mass of protons
- Ca solid mass surrounded by electrons
- Da fuzzy cloud
6What does the electron cloud model describe?
- Arapidly moving nucleus
- Brapidly moving electrons
- Crapidly moving neutrons
- Drapidly moving protons
7Which statement is completely accurate?
- AAtoms of the same element always have different numbers of neutrons.
- BAtoms of the same element can have different numbers of neutrons.
- CAtoms of the same element always have different atomic weights.
- DAtoms of the same element can have neutrons but exist without protons.
8If an oxygen atom has 8 protons in its nucleus, what is its atomic number?
- A4
- B6
- C8
- D12
9If a substance cannot be broken down chemically into a simpler substance, it is _________.
- Aan element
- Ban atom
- Ca molecule
- Da compound
10What is atomic mass?
- Aonly the neutrons in the atomic nucleus
- Bonly the protons in the atomic nucleus
- Cthe sum of all protons and neutrons in the atomic nucleus
- Dthe sum of all electrons in the atomic nucleus
11Which term describes elements with different atomic masses due to varying numbers of neutrons?
- Aatomic mass units
- Bisotopes
- Catoms
- Dnuclei
12If a carbon isotope has 6 protons and 7 neutrons, what is its atomic mass?
- A6 amu
- B7 amu
- C13 amu
- Dnot enough information to calculate
13The fundamental particles of protons and neutrons are called ________.
- Amolecules
- Belectrons
- Cnucleons
- Dquarks
14What is the atomic nucleus made of?
- Anucleons
- Bonly protons
- Conly neutrons
- Delectrons
15The nucleus is held together due to the _____________.
- Aattraction between the electrons inside the nucleus
- Battraction between the quarks in the proton and neutrons
- Celectromagnetic attraction between two protons
- Delectromagnetic attraction between two neutrons
16Radioactive decay _______________.
- Ahas no effect on temperature
- Babsorbs heat
- Cgives off heat
17Why would an atomic nucleus give off a particle?
- Ato emit radiation
- Bto become stable
- Cto change atomic number
- Dto increase atomic mass
18When does an element become a different element?
- Awhen radiation is emitted
- Bwhen the number of neutrons in the nucleus decreases
- Conly when the number of electrons in the outer shell changes
- Donly when the number of protons in the nucleus changes
19The loss of a particle such as a proton as an atom tries to become stable is called ______________.
- Aradiation
- Bradioactive decay
- Can isotope
- Dionization
20If a substance is emitting radiation very slowly, what can you determine about its half-life?
- Ait has a long half-life
- Bit has a short half-life
- Cit has no half-life
21_______________ is the amount of time it takes for half a radioactive substance to decay.
- Adecay time
- Bstability time
- Cisotope time
- Dhalf-life
22What is nuclear fission?
- Athe splitting of the atomic nucleus into parts
- Bthe process of two or more atomic particles sticking together to form a heavier atomic nucleus
- Cthe creation of high-energy plasma
23What is nuclear fusion?
- Athe splitting of the atomic nucleus into parts
- Bthe process of two or more atomic particles sticking together to form a heavier atomic nucleus
- Cthe creation of high-energy plasma
24Elements are formed from ________________.
- Anuclear fusion in molten lava
- Bnuclear fission in rocks and minerals
- Cnuclear fission in stars
- Dnuclear fusion in stars
Información
- Descripción
- Test sobre Unit 4 Physical Science, creado por Rylee W el 12/03/2015.
- Autor
- Rylee W
- Idioma
- English
- Visitas
- 1
- Valoración
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