Atomic Structure
the number of protons in an element/atom
What are the forces that describe the attractive and repulsive forces between protons-protons, electrons-electrons, and protons-electrons?
electromagnetic forces
Dalton observed that atoms combined in whole ratios: in water, there is always 2 H and 1 O or in carbon, there is always 1 C and 2 O. This is called the Law of ___________________.
multiple proportions
tearing a piece of paper in half is a ________ property
physical
Who is Ms. Hult's favorite BTS member? Why?
RM - Kim Namjoon because he's very smart and handsome
mass number is equal to ________________
the number of protons and neutrons in the nucleus of an atom
What force holds protons together in the nucleus despite the repulsive forces?
nuclear forces
JJ Thompsons Cathode Ray Tube experiment showed that atoms _________________________
had positive and negative charges
Which of the following is a chemical property?
1. flammability
Which song from BTS talks about the fear of losing joy and passion in what makes you happy?
a. DNA
b. Permission to Dance
c. Euphoria
d. Black Swan
Black Swan
What are cations and anions?
cations - atoms with positive charges due to losing an electron
anions - atoms with negative charges due to gaining an electron
What happens to electromagnetic forces as more protons or electrons are added to an atom?
they increase -- as the amount of charges increases, so does the electromagnetic force
Rutherford didn't like Thompson's "plum pudding" model, so he did the Gold Foil Experiment and discovered _________________. The electrons moved like ___________ around the sun.
that atoms are not a ball of positive energy with little balls of negative energy attached. instead, an atom has a positive center with negative charges circling around it like the planets around the sun.
Sodium exploding is a _________ property; what is this property called?
chemical; reactivity
Kim Namjoon (RM) released an album titled Indigo in 2022. What inspired the album?
a. movies and podcasts about other famous singers and rappers
b. books and novels that talk about self-love
c. art exhibits and his own life experiences
c. art exhibits and his own life experiences
what is an isotope?
atoms of the same element that have different mass numbers due to different neutron numbers
What happens to nuclear forces as an atom increases in size?
nuclear forces get weaker
Bohr didn't like Rutherfords atomic model because Bohr discovered that electrons actually orbit around the nucleus in __________________. He discovered this using _________ physics.
levels or shells, quantum physics
Which of the following is a chemical property of iron?
1. iron corrodes in moist air
What campaign did BTS start with the United Nations Children's Fund (UNICEF)?
a. Poverty Relief Fund - donating money to people who need it
b. Music For All - funding music programs in poor schools
c. Love Yourself - raising money to protect children from violence
d. Dance Academy - give scholarships to students interested in dancing
c. Love Yourself
An isotope of Na has a +1 charge and mass number of 23 amu. What are the number of: protons, neutrons, and electrons? What kind of ion is this?
protons: 11, neutrons: 12, electrons: 10
Cation
it depends on the size of the atoms, but in general, nuclear forces are much stronger because they must overcome the repulsive electromagnetic forces between protons in the nucleus
Bohr's model does a good job of showing how electrons move around the nucleus, but it doesn't satisfy Heisenburgs _____________ _________, so the ________ _________ model was developed.
uncertainty principle, electron cloud
Read the following paragraph about oxygen and pick out all the physical properties listed (6):
Oxygen is a colorless, odorless, and tasteless gas. Oxygen has a higher density than air and it is a very poor conductor of heat and electricity. It is flammable (it supports combustion i.e. burning of other substances) and combines with other elements easily, which is also called oxidizing. Oxygen is soluble in some liquids such as water and alcohol, and it has a neutral pH.
How many songs has RM written (for BTS and other artists like TXT)? Closest answer wins.
217