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velikii [3]
2 years ago
15

explain why some metal occur as free element in nature, why other occur in combined states. give two examples of each type

Chemistry
1 answer:
MaRussiya [10]2 years ago
3 0

Explanation:

Thus, those metals which remain unaffected by moisture, oxygen and carbon dioxide of the air can occur native or free. In other words, the unreactive metals occur in nature in free state because of their low reactivity towards chemical reagents. ... Metals usually occur in combination with nonmetallic elements.

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If the graph of y = a x 2 + b x + c does not intersect the x -axis, then what is true about the roots? Both are real roots. Both
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Answer:

Both roots are imaginary roots.

Explanation:

Consider these things:

If we try to solve x²+1 = 0, notice that we aren't able to solve the equation in Real Number system because there are no negative outputs for quadratic function.

Remember that quadratic function has range greater or equal to the max-min value.

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Answer:

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Which statements indicate what the fossil record suggests about evolution on Earth? Check all that apply.
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