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chemistry

chemistry with atoms solutions etc

QuestionAnswer
Who discovered the existence of atoms Dmitri Mendeleev
Which subatomic particle has a negative charge Electrons
Which has a positive charge Protons
which has a neutral charge Neutrons
Who discovered the first subatomic particle Ernest Rutherford and Frederick Soddy
What does the atomic number tell you about an atom The number of protons found in the nucleus of an atom
Can two elements have the same atomic number No,because the number of protons determines the elements
What does the atomic mass tell you about an atom The number of protons and neutrons in the nucleus of the atom
Can two elements have the same atomic mass Yes the number of neutrons for two different elements might give them the same mass
Which element is the lightest Hydrogen
How many electrons can the first electron shell hold Two
How many can the second electron shell hold Eight
How many naturally occurring elements are there 92
Who developed the periodic table Dmitri Mendeleev
Who’s atomic model is sometimes known as the plum pudding model J. J. Thomson
Which two scientists came up with the planetary model Neil Bohr and Ernest Rutherford
Which subatomic particles are the heaviest neutron
Which subatomic particles are found in the nucleus Protons and neutrons
Who discovered the proton Ernest Rutherford
Who discovered the neutron James Chadwick
Where is most of the mass of an atom found Nucleus
Define isotope each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons
Created by: tanyac