PS01AB TEST - Introduction to Atoms

Matter has _________ and volume
1. smell
2. color
3. mass
4. distance
Matter cannot be ____________ nor destroyed.
1. colored
2. mutated
3. created
4. changed
Dalton said that the atoms of different elements differ in mass and other properties.
1. true
2. false
The Smallest part of matter is an atom.
1. true
2. false
This is NOT a part of an atom - it is a place where atomic particles are found.
1. nucleus
2. proton
3. neutron
4. electron
John Dalton found that two gasses can combine in a special way to form a new ________ like water.
1. element
2. state
3. matter
4. compound
Dalton said that atoms are indivisible - they were not ____________ but were rearranged.
1. colored
2. smelled
3. destroyed
4. melted
______________________ orbit the nucleus like planets orbit the Sun.
1. Protons
2. Neutrons
3. Electrons
4. Nuclear tides
A proton has this charge in an atom.
1. positive
2. negative
3. no charge - neutral
4. sometimes positive, sometimes negative.
Atoms of the same ________ are the same.
1. element
2. compound
3. color
4. location
Atoms combine in the same ratio in a ________ there are always the same ratio of atoms.
1. element
2. compound
3. electron
4. nucleus
The _____________ is in the center of an atom and has the bulk of the mass.
1. negative charge
2. positive charge
3. electron
4. nucleus
Chemical bonds hold ___________ together in a compound.
1. atoms
2. electrons
3. nucleus
4. protons
A neutron has this charge in an atom.
1. positive
2. negative
3. no charge - neutral
4. sometimes positive, sometimes negative.
A electron has this charge in an atom.
1. positive
2. negative
3. no charge - neutral
4. sometimes positive, sometimes negative.
A neutral atom must have exactly one electron for every proton.
1. false
2. true
If a neutral atom has 2 protons, it must have ___________ electrons.
1. 0
2. 1
3. 2
4. 3
Atoms that are held together in a chemical bond in a compound share _________________ .
1. protons
2. neutrons
3. electrons
4. nucleus
________ has mass and volume.
1. space
2. matter
3. color
4. smell
Matter can ________ the way it looks or feels but it can also rearrange atoms.
1. change
2. destroy
3. slide
4. transmit
We use two basic _______ , physical and chemical, to describe matter.
1. colors
2. systems
3. meters
4. properties
Chemists learn about matter by studying the changes that happen.
1. true
2. false
________ properties can be observed without changing the substance itself.
1. chemical
2. physical
3. nuclear
4. electrical
If the physical properties of material change, the ________ that make it up do not.
1. colors
2. molecules
3. atomic number
4. density of materials
________ changes happen when one or more substance is changed into a new substance at the atomic level.
1. chemical
2. physical
3. color
4. packaging
In a chemical change like burning, the molecules themselves change.
1. true
2. false
Physical changes are mostly ________ - we can go back and forth between ice and water.
1. one direction
2. three directions
3. reversible
4. destructive
Energy is always involved in any change, either physical or chemical.
1. true
2. false
two types of properties that chemists use to study matter are chemical changes and _____________ changes.
1. steady state
2. frozen
3. physical
4. mass
Physical and Chemical changes are the major categories of changes that chemists study.
1. true
2. false
These are all physical properties except
1. color
2. texture
3. burning
4. hardness
Ice melting is an example of a physical change.
1. true
2. false
These changes are harder to reverse.
1. physical
2. chemical
3. electrical
4. thermal
What is a good example of a chemical change?
1. melting ice
2. burning leaves
3. painting a house
4. cutting paper
How many times can we change ice into water and back again into ice?
1. 1
2. 2
3. you can't melt ice
4. as many as you wish

PS01AB TEST - Introduction to Atoms

Select the best answer.