1) What percent of the human body is made up of hydrogen, carbon, nitrogen and oxygen? a) 25 b) 45 c) 59 d) 75 e) 99 f) 100 2) Which part of the atom is the smallest? a) Neutron b) Proton c) Electron 3) How big is an atom? a) one centimeter b) one millimeter c) the size of the width of a sheet of paper d) one millionth of the width of a sheet of paper. 4) Which two parts of an atom form the nucleus? a) proton and electron b) electron and neutron c) neutron and proton 5) The weight of atoms is represented in what? a) AMU b) AMP c) AAU 6) Mass refers to what about an atom? a) shape b) width c) height d) weight 7) Where do you find most of an atom's mass? a) nucleus b) electrons c) protons d) neutrons 8) What is the name for a positively charged article? a) electron b) proton c) neutron 9) What do we call an uncharged particle? a) electron b) proton c) neutron 10) In the structure of an atom, where are the electrons found a) attached to protons b) attached to neutrons c) in shells orbiting the nucelus d) in the nucleus

Atom Review

由
打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？