d. The farther an electron is from the nucleus, the greater its energy.
Explanation:
The energy of an electron relates with the distance from the nucleus in that the farther an electron is from the nucleus, the greater its energy.
The nucleus of an atom is where the protons and neutrons are located.
Electrons orbits round the nucleus in certain permissible energy levels.
- According to quantum mechanics and the Bohr's model of the atom, the energy levels of orbital electron is quantized.
- The ground state is the state with the lowest energy and close to the nucleus.
- The outer most electrons are located in the highest energy levels
- Therefore, the farther an electrons is from the nucleus, the greater its energy
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Answer:
The correct answer is the third statement.
Explanation:
Alexander Fleming was a Scottish biologist, pharmacologist, and botanist. He discovered Penicillin by accident in 1928. While performing research for determining the characteristics of staphylococci, he stacked all the research jars containing staphylococci in the corner of his lab and went to enjoy the holiday with his family.
After coming back, he witnessed that some of the jars had fungus surrounding them and the majority of staphylococci got eradicated. This marked the discovery of penicillin. It was a novel kind of medicine, which exhibited a tendency to treat infections. Thus, it can be concluded that he discovered a novel kind of medicine, which could treat infections.
Answer:
Adaptive Immune System
Explanation:
The adaptive immune response consists of cellular immunity and humoral immunity. They both involve specialized cells for fighting off bacteria and viruses which is what the adaptive immune system is responsible for.