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Structure of the Atom
Masses of Atoms
The Periodic Table
Test Questions
Test Questions
100
This contains the protons and neutrons.
What is the nucleus.
100
The number of protons in an atom is equal to a number called...
What is the atomic number.
100
Here the elements are arranged by increasing atomic number and by changes in physical and chemical properties.
What is the periodic table.
100
TRUE OR FALSE: Elements having three or fewer electrons in the outer energy level are classified as nonmetals.
What is FALSE: Metals.
100
TRUE or FALSE: The maximum number of electrons in the second energy level of an atom is 4.
What is FALSE: 8
200
These are positively charged.
What is protons.
200
The __________ of an atom is the sum of the number of protons and the number of neutrons in the nucleus of the atom.
What is mass number.
200
The vertical columns in the periodic table are called ________.
What is groups
200
TRUE OR FALSE: The symbol for chlorine is C.
What is FALSE: Cl
200
TRUE or FALSE: Two isotopes of carbon are carbon-12 and carbon-14. These isotopes differ from one another by two electrons.
What is FALSE: neutrons.
300
These are the smallest particle; they make up protons and neutrons.
What are quarks.
300
Fill in the equation: number of neutrons = mass number - ______?________
What is atomic number.
300
The horizontal rows in the periodic table are called.
What is periods.
300
TRUE OR FALSE: The identity of an element is determined by its number of protons.
What is TRUE.
300
A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass number is______.
What is 56 (protons + neutrons).
400
This is the area around the nucleus of an atom where its electrons are most likely found.
What is the Electron Cloud.
400
Atoms of the same element that have different numbers of neutrons.
What is isotopes.
400
In step one (energy level 1) how many electrons can fill that electron shell?
What is 2.
400
TRUE or FALSE: The region around the nucleus occupied by the electrons is called the negative zone.
What is FALSE: Electron Cloud.
400
The ______ is used to accelerate protons in the study of subatomic particles.
What is Tevatron.
500
What 3 subatomic particles make up an atom?
What are protons, neutrons, and electrons.
500
The weighted average mass of the mixture of its isotopes.
What is average atomic mass.
500
In energy level 4, how many electrons can fill that shell?
What is 32.
500
TRUE or FALSE: According to present atomic theory, the location of an electron in an atom is best represented by a probability cloud.
What is TRUE.
500
Atoms of the same element with different numbers of neutrons are called ______.
What is isotopes.