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Katarina [22]
3 years ago
13

6. What is true about Calcium (Ca)?

Chemistry
1 answer:
sasho [114]3 years ago
8 0

Answer:

C. naturally uncombined with other elements.

Explanation: Calcium is a chemical element with the symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air.

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Which statements are true about light waves? (Select all that apply.)
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Can someone please help me with this asap <br><br>what is the value of d<br>​
Stella [2.4K]

The value of "d" is 80°

Explanation:

Cyclic quadrilaterals are the special group of quadrilaterals with all its base lying on the circumference of the circle. In other words, a quadrilateral inscribed in a circle is called a cyclic quadrilateral.

Cyclic quadrilateral are characterised by some special features such as

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Using the property 1  

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100° +∠D must be equal to 180°  

D=180° -100° =80°

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