What is the number of protons in the nucleus of an atom?
duh.. the atomic number
100
What is a thing that is composed of two or more separate elements; a mixture.
compound
100
What is an atom or molecule with a net electric charge due to the loss or gain of one or more electrons?
What is an ion
100
What is a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure appear in vertical columns?
periodic table
100
What is a positively charged particle?
proton
200
What are the four states of matter?
gas, liquid, solid, and plasma duhhh!!!!!
200
what is an electrically neutral particle?
neutron
200
What are elements in the same column of the periodic table?
what are GROUPS congrats you finally got one!
200
American physicists determined the charge of an electron.
What is Robert Millikan
200
student of Rutherford discovered the neuron.
What is James Chadwick
300
What is the principle building blocks of the nucleus
nucleon
300
What is a table of nuclides or chart of nuclides is a two-dimensional graph in which one axis represents the number of neutrons and the other represents the number of protons in an atomic nucleus?a
a isotope
300
What is a description that uses numbers and symbols of elements to describes the proportions of elements in a compound or reaction?
What is chemical formula
400
What is the ratio in mass of electron to nucleon?
what is a electron is about 1/1800 of the nucleon
400
English physicist-discovered the electron using cathode ray experiment.
What is J.J. thomson
400
English physicist worked with proton experiments that led to the periodic table being arranged according to the number of protons in the nucleus
What is Henry Moseley
400
What are the number of electron shells in a aluminum atom according to the shell model of an atom?
Aluminum=3
400
Danish physicist developed the bohr model of the atom
What is Niels Bohr
500
What are the number of electron shells in a lithium atom according to the shell model of an atom?
Lithium=2
500
What is the explanation for heavy iron having mostly empty space at a atomic level?
the atoms themselves are mostly empty space.
500
What are the number of electron shells in a hydrogen atom according to the shell model of an atom?
Hydrogen=1
500
student of Rutherford-discovered the neutron
What is james chadwick
500
What is the name of the person who discovered the proton, alpha and beta radiation, confirmed and named gamma radiation?