What are the elements in the periodic table organized by?
Atomic mass
100
Fill in the blank:
A metal is an element that is a good conductor of __________ and _______.
A metal is an element that is a good conductor of -electric current- and -heat-.
100
How do you find the number of neutrons in an atom?
The atomic mass minus the atomic number.
200
Which of the following is NOT the name of someone's atom model:
A. Thomson's model
B. Rutherford's model
C. Boyle's model
C. Boyle's model
200
What the larger letters in the middle of the element?
A. Atomic mass
B. Atomic number
C. Chemical symbol
D. Element name
C. Chemical symbol
200
What is thermal conductivity?
The ability to transfer heat.
200
Who first discovered the periodic table?
Dimitri Mendeleev.
300
True or false:
The number of protons is the same as the number of electrons.
True.
300
What is the word under the middle letters?
A. Atomic mass
B. Atomic number
C. Chemical symbol
D. Element name
D. Element name
300
True or false:
Reactivity is the ability to transfer electric current.
FALSE:
A. Reactivity is the ease and speed with which a substance reacts with other substances.
B. Electrical conductivity is the ability to transfer electric current.
300
What is energy level?
Energy level - the specific amount of energy an electron has.
400
What year was the neutron discovered?
1932.
400
What is the above the middle letters?
A. Atomic mass
B. Atomic number
C. Chemical symbol
D. Element name
B. Atomic number
400
What is corrosion?
The gradual wearing away of a metal due to a chemical reaction.
400
True or false:
Periods are the elements with similar characteristics (families).
False:
A. Groups are elements with similar characteristics (families).
B. Periods - contains a series of different elements (horizontal rows).
500
What is an isotope?
Isotope - an atom of the same element with a different number of neutrons.
500
Which of the following is on the bottom of the elements of the periodic table?
A. Atomic mass
B. Atomic number
C. Chemical symbol
D. Element name
A. Atomic mass
500
What is the definition of ductile?
Ductile - A material that can be pulled out or drawn into a long wire.