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Boron, atomic number 5, occurs naturally as two isotopes, 10B and 11B, with natural abundances of 19.9% and 80.1%, respectively. (c) Indicate three ways in which the 1s electrons in boron differ from its 2s electrons. (d) Elemental boron reacts with fluorine to form BF3, a gas. Write a balanced chemical equation for the reaction of solid boron with
An uncharge atom of boron has an atomic number of 5 and an atomic mass of 11.
The atom having 5 as the atomic number, and 11 has the mass number have 5 protons. Thus, option A is correct. What is mass number? In an atom, the nuclei consists of protons and neutrons. The sum of the protons and neutrons in an atomic nuclei determines its mass number. The atomic number of an atom is the number of protons in an atom.
Chemistry questions and answers. 5. Boron, atomic number 5, occurs naturally as two isotopes, 10B and 11B, with natural abundances of 19.9% and 80.1%, respectively. Indicate three ways in which the 1s electrons in boron differ from its 2s electrons. (3)6. Place the following in order of increasing size: K+, Kr, Cl−, S2− ...
The proton number of boron is 5 which is the same for the atomic number. The atomic mass is given as 11. The atomic mass of an element is computed as the sum of proton and neutron . Atomic mass= proton + neutron . For an atom that is neutral the number of electron should be equal to the number of proton. The equality accounts for it neutral nature.
Step 1. The atomic number of boron is 5, which means that a neutral boron atom has 5 electrons. To determine... View the full answer Step 2. Unlock. Step 3. Unlock. Answer. Unlock.
1. Boron, atomic number 5, occurs naturally as two isotopes, 10B and 11B, with natural abundances of 19.9% and 80.1%, respectively. [18 points](a) In what ways do the two isotopes differ from each other? Does the electronic configuration of 10B differ from that of 11B? (b) Draw the orbital diagram for an atom of 11B. Which electrons are the valence
The number of valence electrons in neutral atom of Boron is 3. The number of valence electrons of a neutral atom of boron (atomic number 5 ) is 2. 8. 10.
The atomic number of an atom represents the number of protons in the nucleus. Mass number is the total number of protons and neutrons in an atom. Therefore, to find the number of neutrons in an atom, you subtract the atomic number from the mass number. In this case, the atomic number of the atom is 5 and the mass number is 11.
In contrast, elements like Boron (atomic number 5), Fluorine (atomic number 9), and Carbon (atomic number 6) do not have a complete octet in their outermost electron shells. They tend to form chemical bonds and engage in chemical reactions to achieve a stable electron configuration.