Chemistry
Elements represent unique forms of these tiny things. The building blocks of everything!
Atoms
Atomic number of nitrogen
7
Protons have this charge
postive charge
Neon and Argon are examples of this.
noble Gases
Elements that are the most abundant on the periodic table.
Metals
The atomic number tells us this.
number of protons
The maxiumum number of electrons in the 2nd energy shell
8
Water is made of these two elements.
hydrogen and oxygen
Most reactive metal
Potassium
What is located in the outermost shell of an atom?
valence electrons
Ions are made in what way.
losing (stealing) or gaining electrons
Making ice cubes from water is what kind of change?
physical change
Covalent bonding happens generally between these type of elements.
nonmetals
Group or family 17 elements are these.
What are Halogens?
The sum of protons and neutrons in the nucleus of an atom is known as the _________
the mass number
A covalent bond is formed by
sharing of electrons
What is maximum number of electrons in the first energy shell?
2
Neutrons have this kind of charge
neutral charge
Name two dangerous acids
HCL and KCL
Lithium, sodium, potassium, rubidium, caesium and francium belong to the family of ______________
Alkali metal.
Group 18 elements on the right hand side of the periodic table of elements.
the Noble Gases
What does increase in the group number? (periodic trend)
Increase in valence electrons, atomic radius and reactivity
Two different elements that have bonded.What is the result known as?
a compound
Alkali metals belongs to this group
What is Group 1
Name all 3 subatomic particles.
Protons, Neutrons, and Electrons
There are this number of elements on the periodic table of the elements.
118
The most abundant gas in the atmosphere.
Nitrogen
Who created the periodic table?
Dmitri Mendeleev
This refers to sets of eight.
the octet rule
AB ---------> A + B
what type of reaction this is?
Dissociation Reaction