Element
What does "Au" stand for?
"Au" stands for gold.
What does CO2 stand for?
Carbon Dioxide
Are mixtures the same as compounds?
No. Compounds are chemically bonded and Mixtures are not. Also, mixtures can be made up of both compounds and elements while compounds are made up of 2 or more elements.
Are metals conductors?
Yes.
Give two examples of insulators.
Plastic, rubber, paper, ceramic, wood, glass, etc.
What is the difference between "H" and "He"?
H stands for Hydrogen, whereas "He" stands for Helium.
What does CuSo4 stand for?
Copper Sulphate
True or False: Elements or compounds in a mixture are chemically bonded.
False. A mixture is formed when two or more elements or compounds are present without being chemically bonded together.
True or False: Rubber is a better conductor than copper.
False. Rubber is an insulator.
True or False: Insulators are used for safety.
True.
Which element has the chemical symbol "Cu"?
Copper
Can a compound be further divided?
Yes, a compound can be separated by physical means such as magnetic seperation, filtration, evaporation, and sublimation.
When you combine Oxygen and Hydrogen (Water), will you get a compound or mixture?
Oxygen and Hydrogen or mostly known as water, is a compound.
What is the definition of a conductor?
A conductor, or electrical conductor, is a substance or material that allows electricity to flow through it.
Why do we have insulators?
Insulators are used in circuits, as they don't conduct electricity, they are used for insulation of wire, switches, plugs, etc. So that circuit could be made shock free and safe to touch.
Can elements be further divided?
No, elements cannot be further divided into smaller substances.
What is a compound made up of?
2 or more elements, substances, or atoms
What is the difference between a heterogeneous mixture and a homogenous mixture?
A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture.
A heterogeneous mixture is a mixture where throughout the solution the composition is not uniform.
What is the strongest conductor?
Pure Silver is the strongest conductor.
In a screwdriver, where should a insulator be installed?
In the end; it stops the flow of electricity to the human hand.
Name three non-metals that are elements.
Hint: Non-metals are substances that are not metals in the periodic table. They are found on the right side of the periodic table, except for Hydrogen.
Hydrogen, Carbon, Nitrogen, Oxygen, Fluorine, Phosphorous, Sulfur, Chlorine, Selenium, Bromine or Iodine.
What does NaCl stand for?
Hint: Use the symbols that stand for different elements in the periodic table to find the compound
Sodium Chloride
What are the following:
- Gold
- Seawater
- Dinitrogen pentoxide (N2O5)
Gold: Element
Seawater: Mixture
Dinitrogen pentoxide (N2O5): Compound
Why do copper wires or the type usually have a rubber or plastic cover on the outside?
Wires have a metal inside because metal is a conductor, and it helps the electricity flow. It has an outer cover of plastic or rubber, as to keep the electricity from shocking people, or starting electric fires.
Why is rubber and plastic put around copper wires that carry electricity?
Rubbers and plastic are used to cover electric wires because they are insulators and do not allow electric current to pass when we touch those wires.