1st Semester Exam 3

Match it! Select the correct answer from the pull down...Good luck!

An atom with 26 protons, 26, electons, and 30 neutrons has a mass number

elements arranged in vertical columns in the periodic table are called

Which of the three subatomic particles are neutral

Atoms of the same element with a different number of neutrons are called

The central core of the atom is called the

isotopes of carbon 12 and carbon 14 they differ from one another by the number of

Which of the three subatomic particles are positive

the maximum number of electrons in the second energy level of an atom is