Answer:
Ocean currents act as conveyer belts of warm and cold water, sending heat toward the polar regions and helping tropical areas cool off, thus influencing both weather and climate. .
A period in the periodic table is a row of chemical elements. All elements in a row have the same number of electron shells.
An electron shell is the outside part of an atom around the atomic nucleus.
Elements present in horizontal rows are called periods.
Elements belonging to the same period have same no. of the shell as the electrons are added in the same shell of the element.
Learn more about the electron shells here:
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(2) hydrogen atoms (4) double bonds
Answer the correct answer out of the four is option c spectroscopy
Explanation- The interaction between electromagnetic radiation and matter studied. This study is commonly known as spectroscopy. It can also be named as study of absorption spectra or emission spectra.
The former spectrum is formed when energy is absorbed from Photons or light energy by electrons while the latter spectrum is formed due to a wavelength of light that is released when electrons jump from higher to lower level.
Answer:
D spectroscopy
Explanation:
(2) Aluminum reacts with sulfuric acid.
(3) Aluminum conducts an electric current.
(4) Aluminum has a density of 2.698 g/cm3 at STP.
The correct answer as to which statement describes a chemical property of aluminum would be that it reacts with sulfuric acid.
There are two properties of every substance - physical and chemical properties.
Physical properties refer to the characteristics that can be observed without altering the substance while chemical properties refer to the characteristics of undergoing chemical changes in reactions.
Physical properties include color, boiling and melting point, hardness etc., while chemical properties include reactivity, toxicity, flammability, etc.
All the options have to do with physical properties of aluminum except its reactivity with sulfuric acid. The equation of reaction is as follows:
Al + H2SO4 ---> Al2(SO4)3 + H2
More on the chemical properties of aluminum can be found here: brainly.com/question/536562
b. created models of the internal structure of atoms
c. used experiments to analyze the relationship between gas pressure and volume
d. developed practical equipment, new procedures, and methods of identifying unknown substances
A scientist who wants to date materials older than 40,000 years would most likely use Potassium – argon dating or K-AR dating. Potassium-40 is a radioactive isotope of potassium that decays into argon-40. The half life of potassium-40 is 1.3 billion years far longer than carbon-14.
Answer:The answer would be uranium-238 hope this helps
Explanation: