1)This question is about the Periodic Table.a) How many elements are there in period 3 of the Periodic Table?(1)b)Place the first 3 elements of period 3 in order of increasing reactivity.(1)c) Explain your reasoning to part (b).(1)d) Mark with an × the statement that best ...
0 8This question is about the periodic table.In the 19th century, some scientists tried to classify the elements by arranging them in order of their atomic weights.Figure 11 shows the periodic table Mendeleev produced in 1869.His periodic table was more widely accepted than previous versions.Figu...
百度试题 结果1 题目Question- Who developed long form of the periodic table? B(a) Lothar Meyer(b) Neils Bohr(c) Mendeleev(d) Moseley 相关知识点: 试题来源: 解析 B 反馈 收藏
QUESTION 4Copy the periodic table below into your answer book. Use the clues to place the elements in their correct positions in the table. Imaginary symbols have been allocated to the elements and these must be used when completing the table.4.1 Q is the inert gas in period 3.(1)4.2R ...
7 Use the Periodic Table to answer this question. D Which two particles have the same number of electrons? A Ar and Ca B Na+ and K+ C Fe^(2+)andFe^(3+) D Ca^(2+)andSc^(3+) 相关知识点: 试题来源: 解析 D 反馈 收藏
9 This question is about elements in Group 1 of the Periodic Table.(a)Which statement is correct about lithium?(1) A lithium is a non-metal B lithium forms a sulfate with the formul a LiSO, C lithium reacts with water to form an alkali D lithium reacts with water to form a white...
Question 1Use the periodic table to write the chemical symbols for the following elements. a. The element that forms a-2 ion with the electron configuration s^22s^22p^63s^23p^6 b. An element from perio d three that forms a basic oxide c. The element from perio d three with the larges...
17 This question is about some of the elements in Period 3 of the Periodic Table.(a)(i) An atom of silicon has mass number 29. Complete the table below showing the numbers of sub-atomic particles in this atom of silicon. Use the Periodic Table as a source of data.(1)Sub-atomic ...
Use the periodic table to write symbols for the following species:6.1.1. 19 protons, 20 neutrons, 18 electrons.(1)6.1.2. 8 protons, 8 neutrons, 10 electrons.(1)6.2. What is valence electron?(2)6.3. Give the electron valency of Mg(1)6.4.Whatiselectronegativity? (2)6.5. Draw Lewis ...
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