Matter & Properties
It must have mass and take up space.
What two characteristics must something have to be considered matter?
Atoms
What tiny particles make up all matter?
H
What is the chemical symbol for hydrogen?
Chemical bonds.
What holds atoms together in a molecule?
Solid
Which state of matter has a definite shape and definite volume?
A balance
What scientific tool measures the mass of an object?
The nucleus
What is the name of the center of an atom?
Which element has the symbol O?
The number of atoms of that element.
In a chemical formula, what does a small number written below and after an element symbol tell us?
liquid
Which state of matter has a definite volume but takes the shape of its container?
How much space the object occupies.
What does the volume of an object tell us?
an electron
Which subatomic particle has a negative electric charge?
C
What is the chemical symbol for carbon?
three
How many oxygen atoms are in O₃?
Particles move faster
What generally happens to particle movement when a substance is heated?
Three physical properties that a scientist can observe.
color, texture, shape,
Protons are positive; neutrons have no charge.
Which two particles are found in the nucleus, and what are their charges?
N
Which element is represented by N?
three atoms are in this and there are two different elements
How many total atoms are in CO₂, and how many different elements are present?
These particles are tightly packed together and vibrate in fixed positions.
What are particles in a solid.
This property explains why two objects of the same size can have different masses.
What is density?
8 electrons; atomic number 8.
An electrically neutral atom has 8 protons. How many electrons does it have, and what is its atomic number?
He The first letter is uppercase and the second is lowercase.
Which symbol correctly represents helium: HE, he, or He?
This molecule consists of two oxygen atoms chemically bonded together.
What is O₂?
These particles remain close together but can move and slide past one another.
What are particles in a liquid?