Chemistry
Still Chemistry
Oh guess what. Chemistry
Surprise! Its Chemistry
Could It Be?!..Chemistry
100
How is an atom electrically neutral?
An atom is electrically neutral because it possess the same number of electrons as protons
100
Explain the Rutherford model.
The atom has mass but is mostly empty space.
100
What is a horizontal row on the periodic table called? What are the columns called?
Period; Group
100
What is a valence electron?
A valence electron is an atom’s outermost electron in the highest subshell (the valence shell)
100
Which groups are the alkali and alkaline earth metals?
Groups 1A and 2A
200
Define Extensive
Extensive: depends on the amount of matter in the sample (mass).
200
Define Intensive.
Intensive: Depends on the type of matter in the sample, not the amount. (i.e. color)
200
What happens when atoms absorb energy?
When atoms absorb energy, electrons move into higher energy levels and to an excited state.
200
What charge do ionic compounds have?
Ionic compounds are neutral.
200
What is the net charge of anionic compounds?
The net charge an anionic compound is zero.
300
True or false? The frequency of light emitted by an electron moving from high to low energy levels is directly proportional to the energy of the electron.
True
300
In the equation E= h*v, h is called ________.
Planck’s constant
300
Who discovered electrons?
Thompson
300
Who discovered the proton?
Goldstein
300
Do nonmetals normally create anions or cations?
Anions
400
Would gaseous acetone be a vapor or gas? Explain
A vapor because in a natural state the acetone would be liquid.
400
Who created the classic quantum mechanics theory?
Schrodinger
400
What do the prefixes of compound names determine?
The subscript of each element in the formula.
400
As you move across the periodic table (left to right), electronegativity ___________. As you down a group, electronegativity __________.
Increase; Decrease
400
As you move across (left to right) the periodic table, atomic size___________. As you down a group, atomic size __________.
Increase; Increase
500
What is one tenant of Dalton’s theory?
A. All elements are composed of elements. B. Atoms of the same element are identical. C. Atoms of different elements can form chemically or combine to form compounds. D. Chemical reactions involve separations, combinations or rearranging of atoms of an elements, but are never changed into other atoms.
500
What is the size relation between cations and atoms?
Cations are smaller than atoms because the electrons are lost. Atoms are larger as they gain electrons.
500
What is the electron configuration for Boron?
1s²2s²2p
500
If a liquid evaporates and leaves no residue, can you determine whether it was an element, a compound, or a mixtures?
Nope
500
How might you separate a mixture of water and salt?
Using distillation
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