16 Questions
Which physical state of matter has a fixed volume but not a fixed shape?
Liquid
In which physical state of matter do the particles vibrate only slightly due to being held tightly in a rigid structure?
Solid
Which physical state of matter has neither a fixed volume nor a fixed shape?
Gas
How do the particles in a liquid differ from those in a solid?
Particles in a liquid vibrate vigorously.
Which type of salt contains complex acids like KAg(CN)2?
Complex salt
What is the characteristic of a double salt, such as KAl(SO4)2·12(H2O)?
It is a molecular compound of two salts of one kind of acid.
Which material would be classified as a homogenous mixture?
Ethanol
What kind of change is the melting of ice in spring considered?
Physical change
What is the charge associated with a neutron?
Neutral
Where are all protons and neutrons found within an atom?
In the nucleus
Which subatomic particles make up almost all of the mass of an atom?
Protons
Why is a nucleus always positively charged?
Because it houses positively charged protons
Who proposed a system of chemical symbols based on the first letter of the elements' name and some based on their Latin name?
John Jacob Berzelius
Which chemist arranged elements into groups of three called triads, where elements in each triad had similar chemical properties and orderly physical properties?
Johann Dobereiner
Which chemist arranged elements into groups of simple substances that do not decompose by any means?
Antoine Lavoiser
Who made a list of elements arranged by increasing atomic weight in a spiral order?
A.E Beguyer de Cancourtois
Learn about the characteristics and charges of protons, neutrons, and electrons, the three main subatomic particles. Understand their differences in charge and mass, and where they are located within an atom.
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