19 Questions
Which group of elements is highly reactive and have 1 valence electron?
Group 1A (Alkali Metals)
Which element group has 8 valence electrons and does not have any charge?
Group 8A (Noble Gases)
Which block of elements is mostly dense and hard?
Transition Metals
Which group of elements has 2 valence electrons and forms a +2 charged ion?
Group 2A (Alkaline Earth Metals)
Which element group is designated with the letter 'A' and includes groups 1A to 8A?
Representative Elements
Which element group has a total of 7 valence electrons and forms a -1 charged ion?
Group 7A (Halogens)
What is the unit used to measure density?
All of the above
Which statement about matter is true?
Matter is made up of atoms and molecules
What is the triple point of pure water?
0.01°C and 4.58 mm Hg
What is the difference between a liquid and a gas?
All of the above
What is the relationship between the phases of matter and intermolecular forces?
Intermolecular forces increase from gas to liquid to solid
What is the difference between a vapor and a gas?
Vapors are the gaseous phase of a substance that is a liquid under normal conditions
According to the kinetic molecular theory of gases, what is the relationship between the molecules in a gas?
The gas molecules are far apart from one another compared to their size and in constant rapid motion in random directions.
What is the relationship between the kinetic energy of gas molecules and the process of evaporation?
Molecules with high kinetic energy evaporate, while molecules with medium kinetic energy are pulled back to the liquid.
What is the purpose of liquefaction of gases?
To decrease the volume of the gas.
What was the contribution of J.J. Thomson to the understanding of the atom?
He concluded that the atom had negatively charged particles called corpuscles, which are now known as electrons.
What was the main conclusion of Rutherford's gold foil experiment?
The atom has a small, dense positively charged center called the nucleus.
What is the relationship between the atomic number and the charge of an atom?
The atomic number is equal to the number of protons, and the charge of the atom is equal to the number of protons minus the number of electrons.
What is the relationship between the mass number and the subatomic particles of an atom?
The mass number is equal to the number of protons plus the number of neutrons.
Learn about density, defined as mass per unit volume, and the properties of matter at different states like solid, liquid, and gas. Understand how the intermolecular attractions vary among the three states.
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