How many periods are on the modern periodic table?
What is 7?
This is defined as the distance from the nucleus to the outside of the electron cloud
What is atomic radius?
Who is Rutherford?
The number of protons control what property of an atom?
What is the identity or type of atom?
The density of solid water at -10 degrees Celsius. Don't forget units.
What is approximately 0.9 g/mL?
Elements in the same main group of the periodic table have the same number of...?
What are valence electrons?
This term describes the energy required to remove an electron from an atom?
What is ionization energy?
What is the same atom with a different mass or isotopes?
Which of the following correctly describes the Bohr model representation of a boron atom?
A. A nucleus with 5 protons and 5 neutrons, surrounded by 5 electrons arranged in the first energy level
B. A nucleus with 5 protons and 6 neutrons, surrounded by 5 electrons in the first energy level
C. A nucleus with 5 protons and 5 neutrons, surrounded by 2 electrons in the first energy level and 3 in the second energy level
D. A nucleus with 5 protons and 6 neutrons, surrounded by 4 electrons in the first energy level and 1 in the second energy level
Answer: C
The periodic table was organized by this property of elements.
What is atomic mass?
Atomic radius generally increases down a group due to what effect?
What is the addition of more shells?
This experiment led to the discovery of the nucleus.
What is the Gold Foil Experiment?
This subatomic particle determines the chemical behavior of an atom.
What is an electron?
2p6
Who is considered the father of the modern periodic table?
Who is Dmitri Mendeleev?
What happens to atomic radius across a period and why?
It decreases because more electrons are attracted to the higher nuclear charge
What is plum pudding?
How many protons, neutrons, and electrons will be in the most abundant, neutral atom of Aluminum?
P: 13
e: 13
n: 14
What is the condensed electron configuration of cesium?
[Xe]6s1
Why were gaps left in the periodic table?
What are future discovered elements?
Explain the trend in reactivity observed of Group 1 metals.
The reactivity increases because as there are more shells the atomic radius increases, which lowers the energy it requires to pull of the one valence electron (ionization energy)
Science is... done by humans, it is tentative, creative, durable, empirical
How many protons, neutrons, and electrons will be in the most abundant ion of potassium with a +1 charge?
P: 19
e: 18
N: 20
Convert 32 degrees Fahrenheit to degrees Celsius.
Bonus: What is this the freezing point of?
What is zero degrees Celsius (water's freezing point)?