Materials that let electricity and heat pass through it is called
What is conductor?
100
The atomic number of an elements tells you the number of
What are electrons or protons?
100
This cannot be seen to the naked eye.
What are atoms?
200
The three basic components of an atom are
What are protons, neutrons, and electrons?
200
Any metal that can be rolled or pounded into flat sheets
What is malleable?
200
These two particles make up an element's atomic mass.
What are protons and neutrons?
200
Scientists use this instrument to "see" atoms.
What is a electron/field ion microscope?
300
Water, aluminum, and redwood trees all have this in common.
What are atoms?
300
This reaction causes rust to occur, the gradual weakening and wearing of iron metals.
What is a chemical reaction?
300
Atoms in the same ________ of elements on the periodic table share similar physical and chemical properties.
What is group or family?
300
Identify the elements in this molecule: C02
What are oxygen and carbon?
400
Negatively charged particles that move around the atom's nucleus are the
What is an electron?
400
Sterling silver is a combination of silver and copper. Which of the following is a combination of two or more metals?
1. aluminum
2. lead
3. gold
4. brass
What is brass?
400
Look at the periodic table. This is a pure element. It has 47 protons.
What is silver?
400
A combination of molecules forms this.
What is a compound?
500
The smallest particle of an element is the
What is the atom?
500
A metal spoon was left in a pot of boiling soup. The cook burned a finger by touching the spoon. The metal spoon conducted what to the cook's hand?
What is heat?
500
Look at the periodic table. This element has 20 electrons.
What is calcium?
500
A scientist uses an instrument to observe the pattern of molecules. The picture below shows what the scientist sees. What state of matter does the scientist most likely sees?