periodic table :) Flashcards
What is a mixture?
Two or more substances mixed together
What is a compound?
A thing made up of two or more substances.
What is the charge of a nucleus?
Positive
What is a nucleus of an element made up of?
Protons and neutrons
What is a charge of a Proton?
Positive
What is a charge of a neutron?
Neutral
What is a charge of an electron?
Negative
What is an ion?
When an electron is lost or gained
What is an isotope?
When two elements have the same number of protons but different number of neutrons.
What is the equation for Relative Atomic Mass?
(mass number x %) + (mass number x %) /100
What is the equation for Weighted Average? (two isotopes)
(mass x number) + (mass x number) / total number
Name 3 properties of Noble gases
Colorless, odorless and unreactive
Why are noble gases unreactive?
Because they have a full outer shell.
Name the Halogens from most reactive to least reactive.
Fluorine, Chlorine, Bromine, Iodine
What’s the difference between the plum pudding model and nuclear model?
The plum pudding model had negatively-charged electrons embedded within a positively-charged. The nuclear model of the atom consists of a small and dense positively charged interior surrounded by a cloud of electrons.
