Chemistry atomic structure 1.2 Flashcards
What is group 1 known as in the periodic table?
Group 1 is known as the Alkali metals
What is group 0 known as?
The noble gases
What is group 2 known as?
The Alkaline Earth
What is group 7 known as/
The Halogens
What is a proton atoms charge?
+1
What is a neutron atoms charge
0
What is an electrons charge?
-1
What is a protons mass and position
1 amu and its in the nucleus
What is a neutrons mass and position
1amu and its in the nucleus
What is a electrons mass and position
almost 0 and its in the shell
What does Na- mean?
It means it has gained an electron
What does Na+ mean?
It means it has lost an electron
How many electrons does the 1st shell hold?
2 electrons
how many does the 2nd shell hold?
8 electrons
how many does the 3rd shell hold?
8 electrons.
If it is full what is it?
A noble gas
What is the mass number?
Mass number of an atom is equal to the number of protons added to the number of neutrons
What is the atomic number?
Atomic number is the number of protons present. It is used to identify an element by number.
What are ions?
Ions are formed when atoms lose or gain electrons to obtain the stable electron arrangement. Of a noble gas.
What are Isotopes?
Atoms with the same number of protons but different number of neutrons.
