Chemistry
The maximum number of electrons in the first energy shell
What is 2?
What is the element symbol for Flerovium?
Fl
Protons have this charge
What is a postive charge?
if the enthalpy is negative the type of reaction is an e............ reaction
exothermic
Elements that are the most abundant on the periodic table.
What is a Metal?
The number you use to find the number of electrons in a neutral atom.
atomic number
4 states of matter
Aqueous, Solid, liquid, and Gas
What is the element symbol for Calcium?
Ca
Baking ingredients for a cake results in what kind of change?
chemical change
name the 3 sub-atomic particles of the atom
protons, neutrons, electrons
The atomic number tells us this.
What is the number of protons?
The maxiumum number of electrons in the 2nd energy shell
What is 8?
Water is made of these two elements.
What is hydrogen and oxygen?
electron number transferred from magnesium to a chlorine atom.
1 only to Each chlorine atom.
the atomic number of selenium
34
Group 18 elements on the right hand side of the periodic table of elements.
What are the Noble Gases?
temperature of ice
0 degrees
Two different elements that have bonded. they form a
compound
Alkali metals belongs to this group
Group 1
How many moles in 28 grams of nitrogen?
2 moles of nitrogen.
What is losing (stealing) or gaining electrons?
Ions are made in what way.
Making ice cubes from water is what kind of change?
physical change?
Covalent bonding happens generally between these type of elements.
non-metals
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 _________
What is the mass number?
A covalent bond is formed by
What is the sharing of electrons?
atoms of similar mass number but different atomic number
isotopes
Neutrons have this kind of charge
What is a neutral charge?
Finish the sentence:
Energy is neither ..... nor ...... it is simply converted from one form -- ------
created
destroyed
to another.
How many atoms in 34 grams of carbon?
1.7 x 1024 atoms
Lithium, sodium, potassium, rubidium, caesium, and francium belong to the family of ______________
Alkali Metals
will sodium react with AgCl(s)?
No!
Valence electrons are located in this shell
What is the outermost shell of an atom?
This refers to sets of eight.
octet rule
Molecular layer is found in the stratosphere of the atmosphere. What is its molecular formula?
O3