Unit 1
What is chemistry?
The study of matter
I KL is equal to how many mL?
1,000,000 mL
What does the atomic number determine?
The number of protons in the element
When an electron absorbs energy, does it move to a higher or lower energy level?
Higher energy level
T/F: The more valence electrons, the larger the atom
False. As valence electrons are added, the attraction becomes stronger, "squishing" it and making it smaller.
What is organic chemistry?
The study of matter contain gin carbon
Complete the equation: density=____/____
Mass/Volume
Where are protons, neutrons, and electrons located?
Protons and neutrons are located in the nucleus, electrons are located in the electron cloud around the nucleus.
Which color of visible light has the shortest wavelength?
Violet
What are the names of positive and negative ions?
Positive ions are cations.
Negative ions are anions.
What is inorganic chemistry?
The study of matter without carbon
Name the official units of measurement for:
1) mass
2) temperature
3) time
4) amount of matter
5) length
1) kilogram
2) kelvin
3) second
4) mole
5) meters
Who believed that atoms of a given element are identical in size, mass, and other properties?
Dalton
What does the Ufbau Principle State?
An electron occupies the lowest-energy orbital that can receive it
Going from left to right on the periodic table, does the electron affinity get smaller or larger?
Larger
What is physical chemistry?
Chemistry with the forces of matter
What do mass and weight measure?
Weight measures gravity and mass measures how much matter an object contains.
Who was the first to “discover” an atom?
Democritus
Where are valence electrons located?
The outermost she’ll of the atom.
Out of cations and anions, which ones shrink from the original atom and which ones grow?
What is analytical chemistry?
Finding composition and clarity of chemicals using highly precise measurements
What is the difference between precision and accuracy?
Precision is the degree of exactness with which a quantity is measured. Accuracy is the extent to which a measurement matches the true value.
Who developed the "plum pudding model" and discovered protons?
JJ Thompson
What is a particle of light called?
A photon
What are the order of the blocks of the periodic table from left to right?
S Block, d Block, p Block; f Block is below