States of matter
state of matter has a definite shape and volume?
Solid
When water freezes, it changes from:
liquid-solid
The element represented by “Fe” is:
Iron
The center of an atom is called the
Nucleus
Vertical columns in the periodic table are called:
Groups
state of matter where particles are closest together
Solid
The change from liquid to gas is called:
Exaporation
How many hydrogen atoms are in C₂H₆?
6
Which subatomic particle has a negative charge?
Electron
Horizontal rows in the periodic table are called:
Periods
example of plasma
Ligthning, starts, plasma TV, Neon lights
During melting, the temperature of the substance:
increases
In Fe2(CO3)3 how many carbon atoms are there?
3
The first person to propose that matter is made of tiny particles called atoms was:
Dalton
Bohrs model for an atom with an atomic number of 20
Calcium
state of matter that takes both the shape and volume of its container
Gas
Sublimation
A chemical symbol represents one element, while a chemical formula shows a compound made of several elements.
The number of protons in an atom is called the
Atomic number
Bohr’s model introduced:
Energy levels