When elements come together to make compounds, they retain their individual properties.
true
false

False

Explanation:

When elements combine to form a product, they lose their individual unique property to form new properties identical to the compound formed. This lose in property could be natural state of matter, malleability, magnetic property, texture etc. Eg Hydrogen (H) combines with Oxygen to form variety of compounds conforming to various oxides. When two molecules of H combined with one molecule of oxygen, water which it's natural state is liquid is form hence losing the natural gaseous state of oxygen or hydrogen.

Another example is sodium and chlorine to form sodium chloride (table salt). Sodium is a group one metal and chlorine a gaseous element in group 17 which is greenish yellow in colour combines to form sodium chloride which its white in colour. Hence lose in color property has occurred in the new compound.

-first use of geothermal energy occurred more than 10,000 years ago in north america by american paleo-indians

-the first industrial use of geothermal energy began near pisa, italy in late 18th century

-in 1904, italian scientist piero ginori conti invented the first geothermal electric power plant in which steam was used to generate the power

-with the above experiment, the first geothermal plant in usa started in 1922 with a capacity of 250 kilowatts

-however, in 1946 first ground-source geothermal heat pump installed at commonwealth building in portland, oregon

-during the 1960’s, pacific gas and electric began operation of first large scale geothermal power plant in san francisco, producing 11 megawatts

-in 1973, when oil crisis began many countries began looking for renewable energy sources and by 1980’s geothermal heat pumps (ghp) started gaining popularity in order to reduce heating and cooling costs

-as effect of climate change started showing results, governments of various countries joined hands to fight against it, for which kyoto protocol was signed in japan in 1997, laid out emission targets for rich countries and required that they transfer funds and technology to developing countries, 184 countries have ratified it

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