Atoms & Elements
This element
What is (Cl) - chlorine or (Ar) - Argon?
An atom that has gained or lost electrons & now has an electric charge.
What is an ion?
This is the concentration of a solution contains 5 g of salt dissolved in 100 mL of water.
What is 50 g/L?
c=m/v
c= 5g / .1L
c= 50g/L
In this reaction, 16 g of methane reacts with 64 g of oxygen producing 36 g of water and this amount of carbon dioxide.
What is 44 g of carbon dioxide?
16g+ 64g = 80g
80g - 36g = 44 g
Objects of the same type of charge will do this to each other.
What is repel?
This element has three valence electrons in its second electron shell.
What is (B) or Boron?
A sodium ion has this charge.
What is +1?
(reason - sodium atom loses one electron)
This is the concentration in ppm when a water sample contains 0.003g of copper in 1L of water.
1 ppm = 1 mg / 1L
1g = 1000 mg
What is 300mg?
1g = 1000mg,
0.003g x 1000 = 3mg,
1mg/1L = 3mg/1L = 3ppm
Balance this equation
_ CH4 + _O2 --> _CO2 + _H2O
1 CH4 + 2 O2 --> 1 CO2 + 2 H2O
A circuit has a voltage of 12V and a resistance of 4Ω. This is the current.
(I = V/R)
What is 3 A?
V= 12V, R= 4Ω, I= ?
I= V/R
I= 12/4
I=3A
These are the horizontal rows of the periodic table.
What are periods?
This is the reason why noble gases usually do not form ions.
The solution has a concentration of 150ppm in a solution of 2L, what is the amount of solute in mg.
(1 ppm = 1mg / 1L)
What is 300mg?
1ppm = 1mg/1L
150ppm = 150mg/L
150 x 2L = 300mg
Balance this equation
_ Fe + _O2 --> _Fe2 O3
What is 4 Fe + 3 O2 --> 2 Fe2 O3?
A toaster uses 8 A of current and has a resister of 15Ω.
This is the voltage.
(V = I x R)
What is 120V?
I = 8A, R = 15Ω, V = ?
V = I x R
V = 8 x 15
V = 120V
These elements will behave chemically like calcium (Ca).
What is (Be) - Beryllium or (Mg) - Magnesium?
Or
Elements in Group 2
This ion is formed by oxygen.
What is O2-?
An acid is a substance that releases this ion in an aqueous solution.
A base is a substance that releases this ion in an aqueous solution.
What is H+ for an acid and what is OH- for a base?
These are the products produced from an acid based neutralization process.
A microwave uses 1200W at 120 V. This is the current it uses.
What is 10 A?
P = V x I or I = P/V
P = 1200W, V = 120V, I = ?
I = 1200/120
I = 10A
This Rutherford-Bohr model is the diagram to model arrangement for sodium.
What is
2) 8) 1)
This happens when an atom gains electrons.
The solution that has change from pH 12 to pH 9 has become this.
What is 1,000 times less basic?
These are the three main types of combustion.
What are rapid combustion, spontaneous combustion, and slow combustion?
This hand rule is used to determine the direction of the magnetic field around a live wire.
What is the right-hand rule?