Answer:
Explanation:
According to the statement of the problems, the following identity exists:
After some algebraic handling, the ratio is obtained:
Answer:
B. Solar energy
Explanation:
The water cycle is driven primarily by the energy from the sun. This solar energy drives the cycle by evaporating water from the oceans, lakes, rivers, and even the soil. Other water moves from plants to the atmosphere through the process of transpiration.
Answer:
A. Stratosphere is said to be stable layer of the atmosphere when cool air sinks and warm air rises.Due to the fact that cool air has tendency to sink ,the air is not going fluctuating up and down in the stratosphere. This means that the air remains stationary or particles remains there for a very long duration.
B. If the lifted index is negative then the parcel temperature is warmer than the actual temperature. In addition, the parcel that is less warm than the surrounding will be less dense and will rise.
C. The water vapor come from different kinds of fronts; gust fronts from existing storms as their downdraft hits the surface, spreads and lifts air in front, upper air disturbances and surface heating by solar radiation making an unbalanced vertical profile .
D. the threshold used by storm chasers to assess if the dew point temperature is high enough to produce large thunderstorms is moisture ,the surface dew point needs to be 55 degrees fahrenheit or greater for a surface based thunderstorm to occur.
E. Wind shear is the change in wind direction or speed with height in an atmosphere.
Explanation:
I would say unlimited polarity because the compass’s needle is always attracted to Earth’s north pole.
Good luck to you!
Elements in group 2 are called alkaline earth metals, the most similarity about the alkaline metals is which chemical properties they have.
<h2>Further Explanation
</h2><h3>Periodic table </h3>
- Periodic table is a table that contains elements arranged in columns called groups and rows called periods.
- Elements are arranged based on physical and chemical properties such that elements in the same group will have similar physical and chemical properties.
<h3>Chemical families </h3>
- Based on the chemical properties elements belong to a family of elements sharing similar chemical or physical characteristics.
- Examples of common chemical families include; alkali metals, alkaline-earth metals, halogens and noble gases among others.
<h3>Alkaline-earth metals </h3>
- These are elements that are found in group 2 of the periodic table. Alkaline-earth metals include, Beryllium, Magnesium, Calcium, Strontium, Barium, and Radium.
Properties of Alkaline-earth metals
- Alkaline earth metals have a valence of two since they form ions by losing two electrons from their outermost energy levels.
- Unlike the Alkali metals, the earth metals have a smaller atom size and are not as reactive compared to alkali metals.
- Alkaline-earth metals are highly metallic and are good conductors of electricity.
- They react with water and steam to form metal hydroxide and metal oxides respectively
- They react with air to form metal oxides
- Reactivity of alkaline metals depends on the ease of losing electrons, thus the reactivity increases down the group as the number of energy levels increases.
- Additionally, alkaline-earth metals have low electronegativities and low electron affinities
Keywords: Chemical families, alkaline-earth metals, reactivity
<h3>Learn more about: </h3>
Level: High school
Subject: Chemistry
Topic: Periodic table and chemical families
Sub-topic: Alkaline-earth metals
