Structure of an atom

What is the number of electrons that can fit in the last level? A. 32+ B. 18 C. 8 D. 2

A. 32+

Atoms that have the same mass number and different atomic numer are called: A. Isotopes B. Protons C. ionic bonds D. nucleus

A. Isotopes

The maximum mass of an atom is concentrated in which of these? A. Nucleus B. Nuetrons C. protons D. Electrons

A. Nucleus

What type of charge does a nuetron have? A. nuetral B. positive C. negative

A. Nuetral

What is the atomic number of an atom equal to? A. Protons B. electrons C. nucleus D. charged particles

A. Protons

The horizontal periods of the periodic table contain elements with: A. The same number of electron shells B. The same numbers of electrons C. The same chemical properties D. The same number of protons

A. The same number of electron shells

What is the maximum number of electrons in level 3? A. 32 B. 18 C. 8 D. 2

B. 18

Who discovered electrons? A. Rutherford B. J.J. thompson C. Neils bohr D. James chadwick

B. J.J. thompson

Who purpose the atomic theory? A. John Dalton B. Robert milikian C. J.J. thompson D. Neils bohr

B. Robert milikian

What is the center of an atom called? A. Atom B. Nucleus C. shell D. inner core

B. nucleus

Which of the following determines the atomic mass of an atom? A. number of electrons B. number of protons C. number of nuetrons

B. number of protons

What is the charge of an ion? A. + B. - C. + or -

C. + or -

What is the maximum number of electrons in level 2? A. 32 B. 18 C. 8 D. 2

C. 8

Where are the electrons located inside the atom? A. Outer shell B. nucleus C. electron cloud D. Inner shell

C. Electron cloud

Which of the following is repsonsible for the mass of an atom? A. Only protons B. Only nuetrons C. Nuetrons and protons D. Protons and elctrons.

C. Nuetrons and protons

Which of the sub-atomic particles is the heaviest? A. Protons B. nuetrons C. electrons

C. electrons

Which of the three sub-atomic particles is the lightest? A. protons B. nuetrons C. electrons

C. electrons

Atoms that bind together because of their opposite charges form: A. covalent bonds B. convalesent bonds C. ionic bonds D. non-ionic bonds

C. ionic bonds

What is the formula for the mass of an atom? A. Protons + electrons B. nuetrons + electrons C. Protons + nuetrons D. None of these

C. protons + nuetrons

What is the maximun number of electrons in the 1 level? A. 32 B. 18 C. 8 D. 2

D. 2