Unit 2 Flashcards
What is the charge of a proton?
Positive
What is the charge of a neutron?
Neutral (No charge)
What is the charge of an electron?
Negative
What is the relative mass of a proton?
1
What is the relative mass of a neutron?
1
What is the relative mass of an electron?
1/1840
How do you find the mass number?
Protons + Neutrons
How do you find the amount of neutrons using the mass number?
Mass number - Atomic Number
A hydrogen atom has a mass number of 2. Write it in atomic notation.
H-2
A helium atom has 2 protons and 3 neutrons. Write it in atomic notation.
5
He
2
What is an isotope?
Atoms that have the same amount of protons but different amounts of neutrons and therefore different mass numbers.
What is the atomic number and chemical symbol for Bismuth
Bi-83
What is inside of a nucleus?
Protons and Neutrons
What is the charge of a nucleus?
Positive
What is the charge of an atom?
Neutral
Where are the electrons located?
In a cloud outside the nucleus.
What is an atom?
The smallest type of particle that still keeps its identity during a chemical reaction.
What are three types of subatomic particles?
Protons, neutrons, electrons
How do you find the atomic mass?
Turn the percent abundance into a decimal, multiply by the mass, repeat with other isotopes, and then add all of those together.
What was the first law in Dalton’s atomic theory?
Elements are made up of tiny indestructible particles called atoms.
What was the second law in Dalton’s atomic theory?
Elements made up of the same atoms are the same, and elements made up of different atoms are different.
What was the third law in Dalton’s atomic theory?
Atoms of different elements can chemically combine or physically mix together in simple whole-number ratios.
