1) What is the charge of a proton? a) Positive (+1) b) Negative (-1) c) Neutral (0) 2) What is the charge of an electron? a) positive (+1) b) negative (-1) c) neutral (0) 3) The first shell holds 2 electrons. How many electrons can the other shells hold? a) 2 b) 4 c) 8 4) How many protons are there in this sodium atom? a) 11 b) 23 c) 12 5) All atoms have the same number of protons and neutrons. True or false? a) True b) False 6) If Beryllium has 2 outer valence electrons, what group will Be be in? a) Group 2 b) Group 3 c) Group 0 d) Group 7 7) If an ion has 9 positive protons and 10 negative electrons, what overall charge will it have? a) -1 b) 0 c) +1 8) What determines an atoms reactivity? a) protons b) neutrons c) valence electrons d) electron clouds 9) What determines an atoms identity? a) protons b) neutrons c) nucleus d) electron shells 10) Where are protons located? a) nuclues b) outer shell 11) Where are neutrons located? a) nucleus b) outer shell 12) Where are electrons located? a) nucleus b) outer shell 13) Atomic number is the same as - (select all that apply) a) atomic mass b) protons c) neutrons d) electrons 14) What is the charge of a neutron? a) positive b) negative c) neutral 15) This is a model of Sodium. How many valence electrons does it have? a) 11 b) 8 c) 2 d) 1 16) Which other element has the same reactivity as Sodium? a) Potassium b) Chlorine c) Boron

Review of Atoms

由
嵌入

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?