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Serggg [28]
3 years ago
6

Hydrogen is in Group 1A of the periodic table, known as the alkali metals, although it obviously isn't a metal. What is the reas

on for its placement in this group? A) Hydrogen has the same electron configuration as alkali metals. B) Hydrogen is a metal, but has an extremely low vaporization point. C) There isn't room for hydrogen on the right side of the table with other nonmetals. D) Scientists didn't want to reconfigure the periodic table after they discovered that hydrogen wasn't a metal. 7)
Chemistry
2 answers:
maria [59]3 years ago
7 0
The answer is a because it's electron configuration is ns1
Dominik [7]3 years ago
6 0

Answer:

The answer is A

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<h3>Further explanation</h3>

Given

distance versus time graph

Required

time travel

Solution

Caterpillar motion is a straight motion with a constant speed, so that the graph between distance and time forms a diagonal line

If we look at the graph, we can determine the time taken when the distance reaches 6 cm (y axis) by drawing a line to the diagonal line and cutting the x-axis as time, and we get 15 s

Or we can also use the formula for motion at constant speed:

d = v x t

With v at point 2,5 of 2/5 m / s, so the time taken:

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andrew-mc [135]
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Be careful because answer A has same masses but different atomic numbers so different atoms(elements)!!!
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