Chemistry Questions and Answers (Q&A)

The correct answer is option A (- 3).
Elements in the periodic table are arranged according to the number of ions they have, for example, sodium a group 1 element has +1 cation, group 2 elements like calcium has +2 cation. Potassium is a group 1 element which means it has one cation....
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Option D is the correct answer -> 2 – 8 – 18 – 7 – 4 Yttrium is one of the elements of the periodic table with an atomic number of 39 (2 – 8 – 18 – 9 – 2) which is the ground state. It is a transition metal; it belongs to group 3 elements of...Read More

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A is the answer to this question. There is only one asymmetric carbon. An asymmetric carbon is also known as a chiral carbon. This is attached to four different types of atoms. At times, it is connected to four different groups of atoms. It is always important to know the different chemical...Read More

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Hey actually Adney is correct there are 5 atoms in a methane molecule, 4 hydrogen and 1 carbon which totals at 5 atoms.

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If substances keep their individual properties, then they are not combining. All the other example answer do involve elements or ingredients mixing together to form an altered substance. Whether this is in chemistry or cooking (a form of chemistry) or painting, the individual parts are distinct...Read More

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Hey John,

That is incorrect. The answer is methane because there is one carbon in the molecule

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This question is incorrect. The formula of velocity is V=d/t, V being velocity, d being distance and t being a period of time. Velocity has nothing to do with the mass of an object, but rather the amount of distance it can travel in a determinedperiod of time.

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Phosphorus is one of the elements that you can find in the periodic table of elements. This is also the element that has the ability to expand its valence shell. This means that aside from the usual 8 electrons, it can hold more than that. Phosphorus is known to be highly reactive. You use it...Read More

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The lattice energy is the energy released when the lattice is formed. It can also be the energy required to break the lattice bonds. These can be covalent or ionic bonds. Depending on the forces between them, the different bonds need specific energy. In the choices given Al2O3 have the hi...Read More

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