Atomic Model
What's the Matter
Compound, Mixture, Element
Isotopes
Periodic Trends
100
What are the 3 particles of an atom?
Proton, neutron, electron
100
Matter is made up of _________
Atoms
100
Which is more easily separated: a mixture or a compound?
Mixture
100
If you change the number of ________ in an atom, you change its isotope
Neutron
100
Where can the metalloids be found on the periodic table? (Be specific)
Along the staircase on the right
200
An element is determined by the number of...
Protons (Atomic number)
200
True or False: All atoms of an element are identical
True
200
You find a bottle labeled copper sulfate. What is its chemical formula?
CuSO4
200
Carbon-14 has how many neutrons?
8 neutrons 14-6 protons = 8 neutrons
200
Rows in the periodic table are called...
Periods
300
The nucleus of an atom contains...
What is protons and neutrons
300
Atoms of different elements combine in simple whole numbers to form ____________
Compounds
300
What are elements made of?
Atoms
300
Write the symbol for an isotope of Tin with 76 neutrons.
Atomic #= 50 (50 protons) 50 + 76 = 126 (mass #) (See white board)
300
As you move left to right across the periodic table, atomic radius (size of the circle)....
Decreases
400
What particles have about the same size and mass as one another?
protons and neutrons
400
True or False: Atoms of different elements have different weights and different chemical properties.
True
400
Cup of coffee: Mixture or compound?
Mixture
400
Nitrogen has 2 naturally occurring isotopes. Which is more abundant?
Nitrogen-14 (7 neutrons)
400
List all 4 properties of a metal
Shiny Malleable (flattens to sheets) Ductile (pull into wires) Conduct electricity
500
What particles are attracted to one another?
Protons (+) and electrons (-)
500
What does (aq) stand for after a compound's chemical formula and what does it mean?
Aqueous means that the substance is dissolved in water
500
Is a can of soda a heterogeneous or a homogeneous mixture?
Heterogeneous (Carbon dioxide bubbles)
500
Radioactive decay happens when an atomic nucleus emits an alpha particle (otherwise known as a helium-4 atom) and transforms into a different element. If Uranium-238 loses an alpha particle what element will it become?
Thorium (Th-234) Lost 2 protons (92 --> 90) Lost 4 particles (238-->234)
500
Which of the halogens has the highest reactivity?
What is Florine
M
e
n
u