Chapter 17 Test Flashcards
(20 cards)
What is an atom?
basic unit of matter
How many subatomic particles does an atom have?
3
What are the subatomic particles and describe them
Protons- + charge and in the nucleus
Neutrons- neutral charge an in the nucleus
Electrons- - charge and outside of the nucleus
What is the nucleus
the center of an atom with a + charge
What are quarks?
smaller particles that make up protons and neutrons
What contains most mass of an atom?
the nucleus
How do you find the mass number or atomic mass?
protons + neutrons
What is atomic number?
number of protons
What are isotopes?
same number of protons but different number of neutrons
What is average atomic mass (weight)
weighted average of the mixture of isotopes in an element
How is the periodic table arranged?
increasing atomic number
What is included in the box of an element?
name, symbol, atomic number, and atomic weight
What are some symbols based on?
Their Latin names
What are the vertical columns called?
Groups/families
What are groups numbered through
1-18
What are groups based on?
They have similar properties, same number of valence electrons, and they have electrons in the same electron cloud
What are the horizontal rows called?
Periods
What are periods numbered through?
1-17
What are periods based on?
Energy levels
What does the electrons dot diagram do?
it helps show what will bond together
