Answer:
1) B
2) D
3) D
Explanation:
Quantum atomic theory was introduced in order to explain the behavior of subatomic particles, which could not be explained using classical physics and dynamics. Many scientists contributed to this, one of them being Heisenberg, who introduced the principle of uncertainty, stating that we can not determine the exact location and direction of motion of electron, and that there are regions of an atom in which the electrons most likely reside. These regions are called the orbitals.
Each atom consists of several energy levels (shells), depending on the number of electrons it has. They are distributed in these levels around the nucleus. Further, these levels are from the nucleus, higher the energy level is. Each shell consists of subshells, which consist of several orbitals, Each orbital has two electrons. So:
-s subshell has 1 orbital, or 1 • 2 = 2 electrons
-p subshell has 3 orbitals, or 3 • 2 = 6 electrons
-d subshell has 5 orbitals, or 5 • 2 = 10 electrons
-f subshell has 7 orbitals, or 7 • 2 = 14 electrons
etc.
When writing abbreviated or condensed electronic configuration we look up to the previous noble gas. This is used to avoid confusion and errors when writing configuration for atoms with a lot of energy levels and orbitals. We use noble gases because they are stable, inert or unreactive because their energy levels are completely filled, so we can use them as a basis on which we add excess electrons from the given atom.
N3H is the correct answer.
N3H is the molecular formula of the smallest neutral compound of nitrogen and hydrogen.
<h3>What is a molecular formula?</h3>
an expression that lists the quantity and kind of atoms that make up a substance's molecules.
<h3>How can you determine a compound's molecular formula?</h3>
- Subtract the empirical formula for molar mass from the molar mass of the chemical.
- The outcome ought to be a full number or extremely close to one.
- Using the entire number discovered in step 2, multiply each subscript in the empirical formula by that number.
- The molecular formula is the outcome.
<h3>Empirical and molecular formula: what are they?</h3>
- The simplest whole-number ratio of the various atoms in a compound is represented by an empirical formula.
- The precise number of various atom types present in a compound's molecule is indicated by the molecular formula.
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Answer:
1254 J
Explanation:
Mass, m = 10.0g
Initial Temperature = 20°C
Final Temperature = 50°C
Energy = ?
Specific heat capacity, c = 4.18 J/g·°C
The relationship between these quantities is given by the equation;
H = mcΔT
ΔT = Final Temperature - Initial Temperature = 50 - 20 = 30 °C
H = 10 * 4.18 * 30
H = 1254 J