Chemistry
The maximum number of electrons in the first energy shell
2
What is the element symbol for Nitrogen?
Protons have this charge
positive
If the enthalpy is negative, the type of reaction is an e......... reaction
exothermic
What elements are the most abundant on the periodic table?
Metals
The number you use to find the number of electrons in a neutral atom.
atomic number
What are the three states of matter?
Solid
Liquid
Gas
What is the element symbol for Calcium?
Ca
Baking ingredients for a cake results in what kind of change?
chemical change
How many moles in 23 grams of nitrogen?
1.64 moles
The atomic number tells us this.
The number of protons
The maximum number of electrons in the 2nd energy shell
8
Water is made of these two elements.
hydrogen and oxygen
How many electrons are transferred from magnesium to a chlorine atom?
2 (1 to each chlorine atom)
The atomic number of selenium
34
Group 18 elements on the right-hand side of the periodic table are called?
The Noble Gases
temperature of ice in Celsius
0 degrees C
Two different elements that have bonded from what?
a compound
Alkali metals belong to this group
Group 1
Name all 3 subatomic particles.
Protons, Neutrons, and Electrons
What is the name for how badly an element wants an electron?
Electronegativity
Making ice cubes from water is what kind of change?
Physical change
Covalent bonding happens between these types of elements.
non-metals
Group 17 elements are also called what?
Halogens
The sum of protons and neutrons in the nucleus of an atom is known as what?
The mass number
A covalent bond is formed by
The sharing of electrons
atoms with SAME PROTONS DIFFERENT NEUTRONS
isotopes
Neutrons have this kind of charge
neutral
Finish the sentence:
Energy is neither ....... nor ......... it is simply converted from one form .. .......
created
destroyed
to another.
Lithium, sodium, potassium, rubidium, caesium, and francium belong to what family?
Alkali metals