4.1
4.2
4.3
5.1
5.2/3
100
Suggested that universe is made of tiny invisible units called atoms.
Who is Democritus
100
What particles are inside the nucleus?
Protons and Neutrons
100
Name the maximum number of electrons in the first 4 orbitals
1. 2 2. 8 3. 16 4. 32
100
the law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements
periodic law
100
Explain why elements in a group on the periodic table have similar chemical properties?
They have a similar amount of valence electrons
200
All atoms of a given element were exactly alike, and atoms of different element can join to form compounds. Who's theory is this?
Who is Dalton
200
What does the atomic number tell you?
The amount of protons (and when neutral, electrons)
200
What causes electrons to jump levels?
When the gain or lose energy
200
the time that it takes a complete cycle or wave oscillation to occur
a period
200
What are noble gasses?
Group 18, are very unreactive
300
What is the mass number?
The number of particles in the nucleus (protons + electrons)
300
Name the four types of orbitals
s, p, d, f
300
What is a group?
a vertical column of elements in the periodic table; elements in a group share chemical properties
300
Define metal
A solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity.
400
Describe Rutherford's diagram of the atom
A positively charged nucleus with negatively charged electrons circling it.
400
How many particles are in a mole?
6.022*10^23
400
Can you determine the exact point where an electron is?
NO
400
How did Mendeleev arrange the periodic table?
by atomic mass
400
Define Ion
An atom, radical, or molecule that has gained or lost one or more electrons and has a negative or positive charge.
500
What else did Rutherford propose about the atom?
That it was more dense at its center
500
What makes a substance neutral?
If it has the same number of protons as electrons
500
Who first thought of the idea of orbitals?
Niels Bohr
500
How is the periodic table arranged now, compared to earlier?
By atomic number rather than mass.
500
What are the three classifications of elements
metals, nonmetals, and metalloids
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