Answer:
d. 26.0 km
Explanation:
If the temperature in the region increases with depth by about 25 °C /km, then at a depth of 2 km the temperature would be 50 °C higher, at a depth of 3 km the temperature would be 75 °C higher and so on.
<u>The only way for finding melted quartz would be if the temperature is at least 650 °C.</u>
- Temperature = 25 °C /km * Depth
We put the data given by the problem and <u>solve for Depth</u>:
- 650 °C = 25 °C /km * Depth
Answer:
C. Ca.
Explanation:
The atom loses or gains electrons forming anion or cation to reach stability (fill the outermost shell of the electron levels).
When atom gains electrons forms anions with negative charge.
While, when atom loses electrons forms cations with positive charge.
A. O:
O atom has 8 electrons in its nucleus and gains 2 electrons to reach stability (10 electrons, configuration of Ne).
<em>So, it forms O²⁻.</em>
<em></em>
B. AI:
Al atom has 13 electrons in its nucleus and loses 3 electrons to reach stability (10 electrons, configuration of Ne).
<em>So, it forms Al³⁺.</em>
<em></em>
C. Ca:
Ca atom has 12 electrons in its nucleus and loses 2 electrons to reach stability (10 electrons, configuration of Ne).
<em>So, it forms Ca²⁺.</em>
<em></em>
D. Na:
Na atom has 11 electrons in its nucleus and loses 1 electron to reach stability (10 electrons, configuration of Ne).
<em>So, it forms Na⁺.</em>
<em></em>
Answer : The average speed of the object is, 10 m/s
Solution : Given,
Distance traveled by the object = 60 m
Time taken = 6 s
Average speed : It is defined as the distance traveled by an object in per unit time. The unit of average speed is, meter/second.
Formula used :
Now put all the given values in this formula, we get the average speed of an object.
Therefore, the average speed of the object is, 10 m/s
Answer:
Each column is called a group. The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons. They are the electrons involved in chemical bonds with other elements.
Explanation:
