22 questions
What elements does this atomic orbital diagram represent?
Silicon
Magnesium
Oxygen
Chloride
What is the subshell notation for Nitrogen?
1s2 2s2 2p6
1s2 2s2 2p3
1s2 2s2 2p6 3s3
1s2 2s2 2p6 3s2
In the following diagram what does the black circle represent, and what would be contained in it?
Electron, protons & neutrons
Proton, electrons & neutrons
Nucleus, protons & neutrons
Nucleus, protons & electrons
How are the particles of H2O behaving in ice?
Loosely packed together, maximum vibrations
Closely packed together, maximum vibrations
Loosely packed together, minimal vibrations
Closely packed together, minimal vibrations
What is the chemical symbol for Sodium?
Na
Sd
So
Sm
What is the atomic number and mass number for Oxygen?
16, 8
8, 16
2, 8, 6
8, 8
What is the definition of mass number?
The number of protons plus the number of electrons
The number of protons
The number of protons plus the number of neutrons
The number of electrons
Do the number of protons always equal the number of electrons in an atom?
Yes
Yes, but only when the atom reacts with another atom
No, only true when the atom reacts with another atom
No, only true when the atom is in elemental form
Which of these 2 diagrams represents a cation?
Right
Left
Both
Neither
Do these 2 diagrams represent the same atom?
No, the number of electrons is different
Yes, the number of protons is the same
No, the number of protons is different
Yes, the number of electrons is the same
What does this diagram represent?
ions of Helium
nucleus of 3 atoms
3 atoms that can react
Isotopes of hydrogen
What is wrong with this chemical equation?
Oxygen can never produce carbon dioxide
The number of atoms of Carbon, Hydrogen and Oxygen are not equal on the sides
It is the wrong way around
It is an unbalanced equation
What is this diagram representing?
Isotopes forming
Formation of an anion
Formation of a cation
Movement of protons
When an ion has a charge of -1, what does this mean
More protons than electrons
More electrons than protons
More neutrons in the nucleus
Less neutrons in the nucleus
What is the solubility of KCl at 10 degrees?
30g/100g water
100g/30g water
57g/100g water
100g/57g water
When you mix oil and water, why does oil float?
Oil is soluble in water
Oil is insoluble in water
Oil is the solvent and water is the solute
Oil is the solute and water is the solvent
If a substance dissolves in water, is it insoluble?
Sometimes
Yes
No
Yes, but only at high temperatures
What are some properties of the compound shown?
Acid, pH 0-1, sour taste
Base, pH 13-14, bitter taste
Acid, pH13-14, bitter taste
Base, pH 0-1, sour taste
What range of colours would universal indicator turn in the presence of a base?
Green - Purple
Orange - Red
Purple - Red
Green - Orange
What is an ionic compound?
Two or more atoms exchanging protons
All gases
Two atoms sharing electrons and forming a bond
One atom giving another atom an electron and forming a bond
What type of reaction is this?
Acid Base
Neutralisation
Precipitation
Ionic
Pollutants that are released into the environment, due to activities of mining, industry, transportation and urban activities, are called?
Inorganic pollutants
Organic pollutants
Environmental pollutants
Industrial pollutants