Chemical Properties
The electrons that are located in the outermost shell of an atom, called valence shells, are ______
Valence Electrons
Noble gases occur in the nature in the form of ______ due to the stability of their electron configuration.
isolated atoms
A pure substance made up of two or more diffrenct elements, always combined fixed proportions
Chemical Compound
The electrostatic attractive force that holds the ions of different signs together in a crystal
Ionic bond
Compute for the molecular mass:
Given the molecular mass of H2O2
Molecular mass of H2O2 is 34
True or False:
Noble gases have full valence shells, which is why they aren`t stable.
False
A solid whose particles are arranged according to a pattern that repeats itself in all three directions of space.
Crystal
In a symbol of an element, which letter is always capitalized?
The first one
True or False:
A property of an ionic: They aren´t soluble in water
False. They`re very soluble in water.
kg/mol or g/mol
In the Periodic table, what groups are the representative elements
Groups 1, 2,13,14, 15, 16, 17
The electrostatic attraction between two or more atoms , which allows them to achieve stability
Chemical Bonding
room temperature
Quartz is a compound formed by the bonding of two non-metals, ______ and ______
Silicon and Oxygen (SiO2)
Bonus Question:
Who sang the song "Despechá"?
Rosalía
True or False:
A noble gas can have only have four electrons in tis outermost shell.
False, noble gases typically have a full electron shell.
18 groups or families
True or False:
Molecular compounds can conduct electric current since they lack free electrons.
False, they don´t conduct electric current.
Number of particles represented by the mole is called _______
Avogrado Constant.
A 24.81-g sample of a gaseous compound containing only carbon, oxygen, and chlorine is determined to contain 3.01 g C, 4.00 g O, and 17.81 g Cl. What is this compound’s percent composition?
How to solve:
%C= (3.01g/24.81g) x 100=_______
12.1% C, 16.1% O, 71.8% Cl
Both halogens and ____ are more reactive, since their valence shells are _______.
Alkali metals; incomplete
The measure of the ease at which an electric charge or heat can pass through a material
Conductivity
The atoms that make up the crystal are linked together by a _______
Metallic bond
The shine quality of a surface
Lustre
Given the formula mass of Ca(NO3)2
What is the molecular mass?
Molecular mass of Ca(NO3)2 is 164.