The Metric System
The metric system unit for mass is...
grams
A burning paper is an example of an...
chemical change
Gold is an example of a(n)
Element
Most of the volume of an atom is occupied by this.
Electron Cloud / Empty Space
How many protons are in the nucleus of an iron atom?
26
Density can be measured in either one of these two units.
g/mL or g/cm3
Cutting vegetables would be an example of...
a physical change
Mixture
What are the three subatomic particles in an atom?
Proton, neutron, electron
Draw a Bohr model for sulfur.
Checked by Ms. Morin
Convert 25 L to mL.
25,000mL
True or False.
A chemical change does not change the chemical composition of a material.
The difference between a homogenous and heterogenous mixture is...
Homogenous = Uniform
Heterogenous = Non-uniform
What is the law of conservation of mass?
Mass cannot be created or destroyed.
What would be the charge of an aluminium ion with 13 protons and 10 electrons?
3+
Convert 0.25 cm to mm
2.5 mm
A nail rusting is an example of
chemical change
One way to separate a mixture is by...
filtration, evaporation, distillation etc.
Which scientist performed the gold foil experiment?
Rutherford
Draw the nuclear symbol for an atom with 11 protons, 14 neutrons, and 10 electrons.
2511Na+1
Convert 0.27 kg to mg.
270,000 mg
True or False.
Phase changes are always physical changes.
True
Something with a definite chemical composition is a...
Pure Substance
Who created the plum-pudding (chocolate chip cookie) model?
Thompson
An isotope is an atom with the same number of _____________ and a different number of ___________.
protons, neutrons