Answer:
Explanation:
The cations are positively charged ions and the anions are negatively charged ions.
Simple cations and anions are named:
Cations that are formed from metal atoms have the same name as metal. If a metal can form cations of different charges, the positive charge is indicated by a Roman number in parentheses after the name of the metal. Cations formed from non-metal atoms have names that end in -ium.
The names of monoatomic anions, as well as some polyatomic anions that do not contain oxygen, are formed by replacing the termination of the element's name with –ide.
The mould and cast fossil is Option B.
The carbon film fossil is Option C.
The Amber fossil is Option A.
The ice fossil is Option D.
Mould and cast fossils are formed when an organism or any organic object gets buried inside sediment and gets decomposed off, leaving an empty space between the sediments which are occupied by different minerals like carbon, calcium, silica etc. Thus, this mineral takes the shape of that decomposed object and stays for years.
The carbon film fossils are those fossils which take long time to form and are difficult to recover as well. They are formed when some organic substance gets very deep into Earth's surface and gets burned by the interior lava into only a thin layer of carbon.
The amber fossils are very common which are formed when the living organisms get stuck in plant resins and dies, which are enclosed into the plant's resin and are recovered thousands of years after.
The ice fossils aren't actually fossil because in very cold regions, the dead bodies often don't decompose but remain as it is for years. Thus the soft tissues are also recoverable after many years.
Answer:
Protons: 50, Neutrons: 75, Electrons: 50
Explanation:
The atomic number, which in this case is 50, determines the number of protons and electrons an atom has. Take the atomic number and subtract the number of protons to get the number of neutrons.
A book dropped from a certain height has no potential energy when it reaches the floor, since the height (a factor in the potential energy equation 'PE = mgh') becomes zero.
The potential energy of an object of mass (m) at height (h) is given by the formula PE = mgh, where g is the acceleration due to gravity (approximated as 9.8 m/s² on Earth). In this case, however, when a book reaches the floor after being dropped, its height is 0 meters, hence its potential energy is also 0 joules because potential energy is dependent on height.
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