Answer:
Hormones
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B) neutrons
C) positrons
D) protons
Answer is B) - neutrons.
Both protons and neutrons contribute to the mass of an atom. But ₈¹⁷O atom has atomic number as 8. Hence, number of protons is 8. Atomic mass of the given atom is 17.
Atomic mass = number of protons + number of neutrons
Hence, number of neutrons in the given atom is 17 - 8 = 9.
So, the number of neutrons is greater than the number of protons. Hence the greatest composition of ₈¹⁷O atom is neutrons by mass.
(2) second electron shell
(3) third electron shell
(4) fourth electron shell
According to the electronic configuration, a calcium atom in the ground state electrons which possess least amount of energy are located in first shell.
Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elementshave valence shell complete in ground state and hence are said to be stable.
According to the electronic configuration,as the number of shells increases their energy also increases .Hence, electrons in first shell have least energy.
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Answer:
1
Explanation:
first electron shell.
First electron shell possesses the least amount of energy at the core.
Hope this helps.
Answer: Boiling point
Explanation:
Boiling point is the temperature where the vapor pressure of a liquid equals the pressure of the gas present above it.
The normal boiling point of a liquid is the temperature at which its vapor pressure is equal to one atmosphere.
Boiling point depends on the intermolecular forces present between the molecules. More are the intermolecular forces, lesser will be the vapor pressure and thus more heat will be supplied to make vapor pressure equal to the atmospheric pressure. Thus higher will be the boiling point.
Normal boiling point for water is .