Answer:
kinetic
Explanation:
kinetic energy is powered by motion or gravity the steeper the hill is the faster a ball will roll
C) After reacting, each ion has a stable octet.
Explanation:
When Na reacts with chlorine gas to form the ionic compound NaCl, after the reaction, each ion has a stable octet.
- The driving force for every reaction is the tendency of the atoms to have completely filled outer energy levels like the noble gases.
- To achieve this configuration, an atom may lose or gain or share electrons.
- In this way, their shells become completely filled and they attain stability.
- In the reaction between Na and Cl, Na, a metal loses an electron. Na then will have a configuration similar to that of Ne, a noble gas.
- The electron is then gained by the chlorine atom and it mimics an argon atom.
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Answer:
boron has an atomic number of 5
but it has 6 neutron
Explanation:
there is no atom which has 5 neutrons and an atomic number of 5.
Answer: The 1 kg fragment will have three times the speed of the 3kg fragment.
Explanation:Here for the bomb, its chemical energy gets converted into the mechanical energy.
According to the law of conservation of momentum, the two bodies will have equal momentum and to satisfy this condition the lighter mass will have the higher velocity.
∵ momentum, p = mass × velocity
∴The 1 kg fragment will have three times the speed of the 3kg fragment.
Back then, Robert Hooke found cells from a cork and named it cells. Later on, Matthias Schleiden found cells from plant parts and concluded that all plants are made of cells. Theodor Schwann, after observing many different animal cells, concluded that all animal have cells. Several years later, Rudolf Virchow hypothesized that cells divide to form new cells. Virchow proposed that every living organism has cells. His observations and conclusions and those of others are summarized in the cell theory