Chem Mid-term review Flashcards
What is an intensive property?
a property that can’t been seen by the naked eye
What is an extensive property?
a property that can been seen by the naked eye
A solid has what comprehensibility, volume, and density?
no comprehensibility, definite volume, and has a high density
A liquid has what comprehensibility, volume, and density?
no comprehensibility, definite volume, and has a medium density
A gas has what comprehensibility, volume, and density?
true comprehensibility, no definite volume, and has a low density
Fusion occurs at what places?
the sun and the stars
Fission occurs at what places and releases more or less energy than Fusion.
releases the most energy and occurs in nuclear power plants
If an object has a density ___ than 1 g/mL or 1 g/cm3 it will ___.
- lower,float
- higher,sink
What is a mixture?
a physical combination of 2 or more substances. On a molecular level, an assortment of different particles
What is a pure substance?
a pure sample that contains 1 ingredient. On a molecular level. all particles are the same
What is matter and what’s not considered matter?
- A physical substance with mass and volume
- light, sound, and heat
What’s the difference between heterogeneous mixtures and homogeneous mixtures.
Homogeneous mixtures are evenly distributed (ex. liquids). While Heterogeneous mixtures are unevenly distributed/ visually distinguished (ex. pepper and salt)
List 5 pieces of safety equipment that would need in a lab room.
googles, gloves, apron, fire extinguisher, eyewash, safety blanket, and shower
What does it mean for a compound to be Ionic?
The electrical charge is balanced, so basically no extra atoms
What does it mean for a compound to be covalent?
Opposite of ionic, has extra atoms of the same element causing a imbalance of the total charge.
What’s the order of electron rings?
s, p, d, f
What group name correlates with the group number?
1, 2 ,17 ,18
1 - Alkali Metals
2 - Alkaline earth metals
17 - Halogens
18 - Nobel gases
What was Dalton known for?
Developed a modern atomic theory but was unaware of subatomic particles
What was Rutherford known for?
found the nucleus stating that it is very small, positively charged, and dense
What was Mendeleev known for?
father of the periodic table(1869)
What was JJ Thomson known for?
stated that electrons are like raisins in plum pudding(+ and - mixed together)
What was Schrodinger known for?
modeled electrons as waves
What was Bohr known for?
planetary model of atom
What was Moseley known for?
He filled in the left out blanks in his periodic table
List the types of electromagnetic radiation in order of highest frequency to lowest frequency:
gamma, x-ray, ultraviolet(UV), visible light, infrared(IR), Microwaves, TV/Radio
What’s the difference between a beta particle and alpha decay?
beta particle is an electron emitted from an unstable atom, while alpha decay is a nucleus emitted from an unstable atom
Why is a cation smaller than the original neutral atom?
more protons, so the electrons are more attracted to the nucleus
Why is a anion larger than the original neutral atom?
more electrons, so the electrons add another electron cloud
Group 1 and 2 are part of what block?
S block
Group 3-12(transition metals) are part of what block?
D block
Group 13-18 are part of what block?
P block
The inner transition metals are part of what block?
F block
