What elements are found to the left of the staircase and form ionic bonds with non-metals, give away electrons and become positive? Hydrogen is the exception.

Answer 1

You refer to the #"Periodic Table............"#

And if you are working on your physics or chemistry homework right now, a copy ought to be in front of you.

In certain Tables, hydrogen frequently shares its Group. Take a look at the Table and the leftmost column. There is a column of metals: lithium; sodium; potassium; rubidium; caesium; francium.

Collectively, these are known as the #"alkali metals"#. These are soft shiny metals; very reactive; and they act to reduce water:

#M(s) + H_2O(l) rarr M^(+)(aq) + HO^(-)(aq) + 1/2H_2(g)uarr#

You ought to provide an update on these metals' atomic numbers.

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Answer 2

Owen Ambrose

Hydrogen is an exception because it is a non-metal; the elements to the left of the staircase are metals because they form ionic bonds with non-metals, giving up electrons to become positive ions.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.