What periodic table group is hydrogen in? Which of the following groups of elements contains the most valence electrons? (a) Halogens (b) Chalcogens (c) Noble gases (d) Alkali metals Which group of the periodic table is known as the alkali metals? List them. ...
Hydrogen is a clean alternative to methane and is the most abundant chemical element, estimated to contribute 75% of the mass of the universe. Find out why hydrogen is important as a future clean energy source to fuel our homes and businesses.
Which chemical element has the symbol Pb? What does each different element on the periodic table of elements represent? What element family does bohrium belong to on the periodic table? What is hydrogen on the periodic table? What family is the element tennessine in on the periodi...
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What is green hydrogen, blue hydrogen, and so on? Producing hydrogen takes energy because hydrogen atoms don't exist on their own — they are almost always stuck to another atom, often another element. (On earth, hydrogen is particularly abundant in the form of water, or H2O.) Creating pu...
How dense is metallic hydrogen? What is the atomic mass of calcium? What is the atomic mass of aluminum? What is the mass number of titanium? What is the atomic mass of californium? What group is argon in? What is the size of an atom? Is it similar to the size of a grain of san...
The meaning of an ‘element’ is a favourite topic for argument among off-duty chemists. We agree (right?) that hydrogen is an element – but what do we mean by that? Is molecular hydrogen gas an element? Or the isolated hydrogen atom? Or are we referring not to some actual substance...
Step 1: Determine the total number of valence electrons in the Formaldehyde. Hydrogen, a Group IA element, has one electron in its outer shell. Oxygen, a Group VIA element, has six electrons in its outer shell. Carbon is a Group IVA element with four electrons in its outer shell. Hence...
What periodic table group is hydrogen in? Which group of the periodic table is known as the halogens? List them. Which group on the periodic table has elements that are almost completely non-reactive? What is the lowest atomically-numbered inert gas element on the periodic table? Which of ...