Atoms
Which has more mass, a proton or a neutron?
Same
Which is the oldest and most plentiful element?
Hydrogen
What role does the atomic number play in the periodic table?
Number of protons and tells what the element is
How would you distinguish between a sodium vapor streetlight and a mercury-vapor streetlight?
The color spectrum produced
What is the tallest mountain in the United States?
Denali or Mt McKinley (20,310 feet)
If atoms are mostly empty space, why do we not fall through our chairs?
Electrical repulsion
Where are elements formed?
Stars
How many periods are there in the periodic table? How many groups?
7, 18
Why is a potassium atom larger in size/diameter than a sodium atom?
It has an extra energy/electron shell
How many Neutrons does an atom of Lead 212 have?
Distinguish between "Atomic Mass" and "Mass Number"
MN- Number of protons in a specific atom, AM- average mass based on all isotopes and their relative abundance
Which is heavier a molecule of NaCl or a molecule of SiO2?
SiO2
What group of elements are found in group 7?
The Halogens
Which color of light comes from a greater energy transition, Blue or Red?
Blue
Draw a Bohr Diagram for Magnesium
3 Shells, 2 valence electrons
If an atom has 50 electrons, 68 neutrons and 50 protons, what is the mass number? What is the element?
118, Tin
How do Carbon and Silicon's valence electrons compare?
They are the same (4)
How many valence (outer electrons) are in sodium?
1
Neon cannot attract any extra electrons. Why?
It has a complete outer shell.
As a tree grows, where does the majority of its mass come from?
Carbon dioxide from the air
How many electrons are in the first (inner most) shell of a chlorine atom?
2
Which has more atoms, a 1-gram sample of carbon-12 or a 1 gram sample of carbon-13?
Carbon-12
92, 92, 143
How can a hydrogen atom, which only has one electron, make so many spectral lines?
One electron can be boosted to many energy levels and therefore make many combinations to lower levels. Each transition is of a specific energy and accompanied by the emission of a photon of a specific frequency. Thus the variety of spectal lines
What is the largest living organism on earth?
The Honey Mushroom in Oregon. It is 2385 acres (or 1350 soccer fields) and between 2400 to 8600 years old.