Which word describes a hypothetical gas that perfectly fits all the assumptions of the kinetic-molecular theory?"
O ideal
O imaginary
O perfect
real

What are the charges of the subatomic particles by choosing the answer from the drop down menu. protons have a (+1,0,or-1). (protons,neutrons,electrons) have a 0 charge. 3.) electrons have a (+1,0,-1)

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

What causes the appearance of lines in a emission spectrum