Element-ary my dear Watson (elements and compounds)
A pure substance that is made from different kinds of atoms bonded together is called a:
a) element
b) compound
compound
True or false: Atoms consist of protons, neutrons, and electrons?
True!
What is the smallest unit of matter called?
a) molecules
b) atoms
c) elements
Atoms
True or false: salt does NOT exist as a molecule?
True
H2 is considered a:
a) element
b) compound
c) mixture
Element
*only one kind of atom
Which part of an atom has a positive charge?
a) neutrons
b) protons
c) electrons
Protons
DNA is a macromolecule. How large can a molecule of this size be?
a) Hundreds of atoms
b) thousands of atoms
c) millions of atoms
d) Billions of atoms
Billions of atoms!!
Is cutting wood an example of a physical or chemical change?
Physical
H2O is considered a:
a) mixture
b) compound
c) mixture
Compound
*more than one different kind of atoms.
What kind of charge do neutrons have
a) negative
b) neutral (no charge)
c) positive
neutral (no charge)
Which of these is not an element?
a) oxygen
b) Hydrogen
c) Carbon
d) water
Water
How many DIFFERENT atoms are in NH4?
2 (Nitrogen and Hydrogen)
What is table salt made of?
a) Pure carbon
b) 1 atom of sodium (Na) and 1 atom of chlorine (Cl)
c) 1 atom of sodium (Na) and 1 atom of hydrogen (H)
1 atom of sodium (Na) and 1 atom of chlorine (Cl)
Electrons have this kind of charge:
a) positive
b) negative
c) neutral (none)
negative
What is a polymer?
a) a single atom of an element
b) a substance only made of metal
c) A large molecule made of smaller units (monomers)
d) a type of gas
A large molecule made of smaller units (monomers)
Describe what takes place during combustion?
a) It is when two liquids mix to form a new substance.
b) A substance reacts with oxygen in the air to produce light, heat and new substances
c) Substances are cooled to extreme temperatures to create a new substance.
A substance reacts with oxygen in the air to produce light, heat and new substances
Diamonds and graphite are both made of Carbon, yet they are completely different. What causes them to look different?
a) They contain different kinds of atoms.
b) They were formed on different planets.
c) Their atoms are arranged in different ways.
d) They have the same structure but different colors
Their atoms are arranged in different ways.
The center of an atom is called the:
a) neutron cloud
b) proton chamber
c) neutron chamber
d) nucleus
Nucleus
What elements do all living things share? (name all 4)
Carbon, Oxygen, Hydrogen, Nitrogen
If the chemical formula for sugar is C12H22O11, this means that there are how many TOTAL atoms in the compound?
45