Which element has the lowest atomic number? The Proton Rule: The element of an atom is determined by the number of protons in the nucleus of an atom. Interestingly, this number cannot change without the atom becoming a different element. This is the only rule for the atoms of an element....
百度试题 结果1 题目10 An isotope of element Y has 19 protons and 20 neutrons in its nucleus. Which is the symbol for the ion of Y? B2039A YB19192039C YD1919 相关知识点: 试题来源: 解析 B 反馈 收藏
更新1: One last question... If the first element of group 1 pares to the last element of group 2... Which is more reactive? And which element of group 2 equals to the reactivity of any element in group 1? For example Ba = Na?? Just for an example..Your question is...
element is atomic number 7, which means each atom has 7 protons. Its element symbol is .如何将EXCEL生成题库手机刷题 如何制作自己的在线小题库 > 手机使用 分享 反馈 收藏 举报 参考答案: Nitrogen;n itrogen;N 复制 纠错举一反三 《中华人民共和国药典》规定的注射用水是( ) A. 反渗透水 ...
Which element has the same number of valence electrons as phosphorus? Which element will most likely gain electrons? a. Cl b. Na c. Ne Why? What is an atom that has more protons than electrons? What element has 10 electrons? What element has 13 electrons?
An atom consists of a nucleus, which contains protons and neutrons, surrounded by electrons. The number of protons determines the element of the atom, while the number of neutrons can vary. Electrons exist in energy levels or shells around the nucleus. 开学特惠 开通会员专享超值优惠 助力考试高...
Hint: Each of the ions has a different number of protons, but each has one electron, so the Bohr model How many electrons in an atom can have each of the following quantum number or sub level designations? n=4, l=3A certain element has its outermost el...
The Modern Theory of Atomic Structure: Atomic number: The number of protons in the nucleus of an atom of that element. –Gives the number of electrons in a neutral element. –Gives the order of elements on the periodic table –If an atom gains or loses a proton it not only changes its...
A) An element is a substance whose atoms all have the same atomic number. B) The atoms ofan element all contain the same number ofprotons C) The atoms ofan element all contain the same numbers of neutrons D) An element is a substance that cannot be broken down any further by chemical ...
A bromine ion contains 35 protons, 35 neutrons, and 36 electrons. What is the net charge of the ion? For a neutral atom of element 37, what would be the probable ground-state electronic configuration? In your expression for the configuration, list the subshells in order of filli...