Vocabulary
Matter
Atoms
Elements
Extra Questions
100
The _______________ is determined by the number of protons in the nucleus of an atom.
Atomic Number
100
Which state of matter has a definite shape and volume?
Solids
100
True or False. Electrons are embedded in a positively charged sphere.
False
100
True or False- The periodic table arranges elements with similar properties into columns.
True
100
What is the Atomic Number of an Element?
Protons or electrons
200
______________ are atoms that have the same number of protons but different numbers of neutrons.
Isotopes
200
A solid to a liquid is an example of _______________
Melting
200
Write the chemical symbol for Sodium.
Na
200
How many elements are on the Periodic Table?
118
200
15.99 is Oxygen's __________________
Atomic Mass
300
What are the three subatomic particles that make up an atom and their charges?
Proton-positive, Neutron-no charge, Electron-negative
300
When a gas turns into a liquid, the process is called ______________
Condensation
300
How do the masses of electrons and protons compare?
The protons have a larger mass than electrons.
300
The _____________ of an atom contains roughly 99.9% of the mass of an atom.
Nucleus
300
What is used for the electrons in the outermost shell or energy level?
Valence
400
The atomic mass equals the total number of the ___________ and ___________ in an atom.
Protons and neutrons
400
The atoms and molecules in ______________ solids are arranged in repeating patterns of rows.
Crystalline
400
Draw a Lewis Dot Diagram for Chlorine (Atomic Number 17)
7 valence electrons
400
What determines almost all properties of the element other than atomic # and mass?
Electrons
400
If Sulfur has an atomic mass of 32 and an atomic number of 16, how many protons does Sulfur have?
16
500
The center of every atom and contains at least one proton.
Nucleus
500
Name three physical properties of a solid.
Density, strength, elasticity, ductility, or brittleness
500
Draw a Bohr Model for Chlorine (Atomic Number 17)
17 electrons (2 in the first energy level, 8 in the second energy level, and 7 in the third energy level.
500
Atoms become charged by gaining or losing electrons is called....
An ion
500
Draw the Lewis Dot Diagram for Silicon.
4 valence electrons
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