Atomic Theory
The Planetary model proved that this subatomic particle was located in the nucleus with a neutral charge
Neutron
This subatomic particle is located outside of the nucleus and has a negative charge
Electron
This classification of matter consists of only one(1) type of atom.
Elements
True or False: The atomic theory has not changed over time
False
The nucleus of an atom contains which subatomic particles?
Protons and Neutrons
Which statement best identifies the nature of science?
A. Everything has been learned already
B. Scientists do not use new evidence to create models
C. New evidence and collaboration shows how science continues to evolve
D. Models never change
New evidence and collaboration shows how science continues to evolve
Electrons are extremely ________________ in size compared to protons and neutrons.
Smaller
This classification of matter is chemically bonded and can only be separated by chemical means.
Compound
Air is a _________________ because it cannot be ________________ combined.
Mixture
Chemically
Sodium (Na), Oxygen (O), and Hydrogen (H), bond together to make NaOH. This is best known as an element, compound, or mixture.
Compound
This model tells us the probability of where electrons are most likely located.
Electron Cloud Model
What subatomic particle(s) contribute to an atom's mass?
Protons & Neutrons
A sample contains only Carbon (C) atoms. Would that be considered a compound, element, or mixture?
Element
What material would be best to separate beads from a mixture with salt/sand.
Fingers or Forceps (tweezers)
True or False: The difference between attraction and repulsion is that to attract is to pull something closer and repel is to push something away.
True
What conclusion is best supported by Rutherford's Gold Foil Experiment observation?
A - An atom is a large ball
B - An atom is mostly empty space
C - Protons have no charge
D - Electrons have a mass of 1 amu
B - An atom is mostly empty space
The number of __________________ in an atom, helps us identify an element.
Protons
Identify if each is an element, compound, or mixture.
1. Water (H2O)
2. Lemonade
3. Helium (He)
4. Salt (NaCl)
5. Nitrogen (N2)
6. Trail Mix
1. Compound
2. Mixture
3. Element
4. Compound
5. Element
6. Mixture
Which statement best identifies the nature of science?
A. Scientists share information/ knowledge and learn from each other
B. A hypothesis is an educated guess
C. Models have limitations
D. A law tells us what happens
A. Scientists share information/ knowledge and learn from each other
I ______________ Ms. Adams! :)
A. Love
B. <3
C. All of the above
C. All of the above
Electrons are more dense around the nucleus in the electron cloud model because
A. Protons inside of the nucleus, and electrons outside of the nucleus, have the same charges and repel each other
B. Protons inside of the nucleus, and electrons outside of the nucleus, have opposite charges and repel each other
C. Protons inside the nucleus, and electrons outside of the nucleus, have opposite charges and attract each other
C. Protons inside the nucleus, and electrons outside of the nucleus, have opposite charges and attract each other
An atom has 11 protons, 12 neutrons, and 11 electrons. Which statement correctly describes this atom?
A. It has a positive charge because it has more neutrons than protons.
B. It has a negative charge because it has more electrons than protons.
C. It is neutral because it has equal numbers of protons and electrons.
D. It cannot be an atom because its particles are unequal.
C. It is neutral because it has equal numbers of protons and electrons.
This classification of matter can be combined and separated physically.
Mixture
List what tools would be useful to physically separate a mixture consisting of sand, salt, iron fillings, and beads.
Beaker
Forceps (tweezers)
Magnet
Spoon / Stirring rod
Filter Paper
An atom is mostly ________________ space.
Empty