30 Answered Questions for the topic Elements

09/22/15

Ionic Size

I really don't understand what this is asking... please help.   1.) As you move left to right across the period, there are two elements that instead show a decrease in ionization energy. Identify... more

09/20/15

To which group in the periodic table does element M belong?

A certain element M is a main group metal that reacts with chlorine to give a compound with the chemical formula MCl2 and oxygen to give the compound MO. To which group in the periodic table does... more
Elements Chemistry Compounds

08/29/15

Some chemistry questions about elements, and compounds

Hello, I humbly appreciate if you will answer these ff. questions.   1. Can you tell whether a substance is an element or a compound based on its physical appearance? 2. Knowing that an element... more

03/26/15

Using Clues to Identify Elements

Elements 2, 5, 18, 29, and 33 are colorless, odorless, unreactive gases. Of these gases, element 29 has the largest atomic mass.Elements 13, 19, 23, and 34 have six valence electrons, and element... more

10/20/14

Venn diagram

- Draw an appropiate Venn diagram and use the given information to fill in the number of elements in each region.   n(A ∩ B) = 21, n(A ∩ B ∩ C) = 6, n(A ∩ C) = 26,        n(B ∩ C)= 7, n(A ∩ C') =... more
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