3. An element is represented as 11X23.
a) Write its electronic configuration. State its valency. b) Find the number of neutrons present in it.
c) Will it form a positive ion or negative ion?
d) Derive the formula of X with oxygen.
Answers
Answer:
a)The symbols used for writing the electron configuration start with the shell number (n) followed by the type of orbital and finally the superscript indicates how many electrons are in the orbital. For example: Looking at the periodic table, you can see that Oxygen has 8 electrons
b)And the number of protons along with the number of neutrons is equal to the mass number of an atom or we can say that the number of neutrons in an atom can be calculated by subtracting the proton number from its atomic mass.
c) positive ion
D)Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. After hydrogen and helium, oxygen is the third-most abundant element in the universe by mass. At standard temperature and pressure, two atoms of the element bind to form dioxygen, a colorless and odorless diatomic gas with the formula O
2. Diatomic oxygen gas constitutes 20.95% of the Earth's atmosphere. Oxygen makes up almost half of the Earth's crust in the form of oxides.[2]
mark as brainliest
Answer:
a)The symbols used for writing the electron configuration start with the shell number (n) followed by the type of orbital and finally the superscript indicates how many electrons are in the orbital. For example: Looking at the periodic table, you can see that Oxygen has 8 electrons
b)And the number of protons along with the number of neutrons is equal to the mass number of an atom or we can say that the number of neutrons in an atom can be calculated by subtracting the proton number from its atomic mass.
c) positive ion
D)Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. After hydrogen and helium, oxygen is the third-most abundant element in the universe by mass. At standard temperature and pressure, two atoms of the element bind to form dioxygen, a colorless and odorless diatomic gas with the formula O
2. Diatomic oxygen gas constitutes 20.95% of the Earth's atmosphere. Oxygen makes up almost half of the Earth's crust in the form of oxides.[2]