Atoms
What is a positively charged subatomic particle?
a proton
What is the atomic symbol for sodium?
Na
What are the rows of the periodic table called?
periods
What compound is CO?
carbon monoxide
What is the name of a mixture that you cannot visibly distinguish the parts?
homogenous
Where are the electrons located?
In shells around the nucleus
Name the 7 metalloids
boron, silicon, germanium, arsenic, antimony, tellurium and polonium
What are the columns of the periodic table called?
groups
a metal and a non-metal (like sodium and chlorine to make sodium chloride)
What is the name of a mixture that you can visibly see the components?
where are protons and neutrons found?
the nucleus
Why is Krypton an extra special element?
It is a noble gas. It has a full outer shell of 8 electrons making it happy, stable and non-reactive
On what side of the periodic table are the metals located?
How many carbons, hydrogens and oxygens make up glucose?
C6H12O6
Provide two examples of methods for separating mixtures?
centrifuge, sieve, distillation, etc
What is the approximate mass of a proton, neutron and electron?
proton 1
neutron 1
electron 1/1200
Sulfur makes an 8 atom, ring like structure with itself (S8). What kind of element is this described as?
a molecular element
Where do you find the Actinides?
Elements 90-103 at the bottom of the periodic table
Describe the properties of Magnesium, Oxygen and Magnesium oxide?
Magnesium is a shiny metal, oxygen an odorless gas. When they react, they are combined chemically to form magnesium oxide, a white powdery compound
a compound is chemically bonded together whereas mixtures are not. They can be physically separated.
For the element Silicon, describe the arrangement of the subatomic particles?
14 protons and 14 neutrons in the nucleus
2 electrons in the first shell, 8 electrons in the second shell and 4 electrons in the third shell
Carbon-12 and Carbon-14 are both carbon. How is this possible?
They both have 6 protons (that's the definition of carbon), but a different number of neutrons. Carbon-12 has 6 neutrons and Carbon-14 has 8 neutrons
at the bottom
Is the air in this room an example of a compound? Explain your answer
No. It is a mixtures of gases that are NOT chemically bonded together.
Is a beaker of tap water a mixture?
Yes! there are water molecules (H2O), ions, probably some small microbes