How valence electrons are defined?

How valence electrons are defined? Valence electrons are the electrons in the outermost shell, or energy level, of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell. What is the best definition of valence electrons? : a single electron or one of two or […]

Why do frogs not have ribs?

Why do frogs not have ribs? When the frog is out of the water, mucus glands in the skin keep the frog moist, which helps absorb dissolved oxygen from the air. Frogs do not have ribs nor a diaphragm, which in humans helps serve in expand the chest and thereby decreasing the pressure in the […]

What are the 4 definitions of abnormality?

What are the 4 definitions of abnormality? WHAT YOU NEED TO KNOW. Definitions of Abnormality: Statistical Infrequency, Deviation from Social Norms, Failure to Function Adequately, Deviation from Ideal Mental Health. What are the biological models? Biological models are experimental systems that recreate aspects of human tissue function or disease. For example, certain tumour cell lines […]

Why is it called a domino effect?

Why is it called a domino effect? Domino effect is an American idiom which has its roots in the Cold War. Knocking over the first domino causes it to knock over the second domino, and so on. The term domino effect stems from a political idea formed by an American journalist named Joseph Alsop which […]

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