Answer:
B
Explanation:
For metals, the further away the valence electrons are from the nucleus, the higher the reactivity of the elements. Unlike halogens that are more reactive if the valence orbital shells are closer to the nucleus. This is due to ionization energies – which is the minimum energy required to discharge an electron from its orbit.
For metals this should be lower because they need to lose electrons to attain a stable electron configuration. For halogens it should be high because they don't need to lose electrons, but rather gain, in order to attain stable electron configuration.
Electrons in their orbital shells need to occur in pairs (with opposite quantum states) to be in stable configuration and as long as an atom has orbitals with single electrons, the atoms will be reactive as opposed to when its orbitals are ‘full’.
Answer:
The correct answer is the alarm reaction.
Explanation:
The alarm reaction or stage is the initial stage of the body's response to a stressful situation or stimuli, due to acquired physiological changes, such as high heart rate and increase in hormones activity.
In simple words, it is a reaction that body adapts in tough or fight or flight situation by pumping blood from the heart to arms and legs to fight or flight.
Thus, the correct answer is alarm reaction.
Basilar membrane is the structure that is responsible for supporting the organ of corti. It is located within the cochlea of the inner ear. In addition basilar membrane is stiff structural element that separate two liquid- filled tubes that runs along the coil of the cochlea.
Answer:
Atoms of the same chemical element do not always have the same mass because, although the number of protons in the nucleus is the same for all atoms of the same element, the number of neutrons is not. Most elements as they occur naturally on earth are mixtures of several isotopes.
Explanation:
Question: <span>When a soccer player begins to run down a field, which organelle in his or her muscle cells releases the available ATP?
Answer: Mitochondria
HOPE THIS HELPS! ^_^</span>
