Which element has the following Electron configuration? *1s22s22p63s2
O Boron
O Phosphorus
O Manganese
O Magnesium
Answers
Related Questions
Under which conditions of temperature and pressure would a 1-liter sample of a real gas behave most like an ideal gas?(1) 100 K and 0.1 atm (2) 100 K and 10 atm (3) 500 K and 0.1 atm (4) 500 K and 10 atm
Which compound reacts with an acid to produce water and a salt(1) CH3Cl (2) CH3COOH (3)KCl (3)KOH
How does hydrogen ion change into hydrogen atom
2. The energy of a photon that has a wavelength of 12.3 nm is _______ J.A) 2.72 x 10^-50B) 1.62 x 10^-17C) 4.42 x 10^-23D) 1.99 x 10^-25E) 1.51 x 10^-17
Answers
Noble gas configuration for Li : [He]2s¹
Further explanation
In an atom, there are levels of energy in the shell and sub-shell
This energy level is expressed in the form of electron configurations.
Lithium with atomic number 3, then the electron configuration:
1s²2s¹
And for noble gas configuration or it can be called Condensed electron configurations :
[He]2s¹
Answer:
[He]2s¹
Explanation:
Answers
Explanation:
It is known that one mole of chromium or molar mass of chromium is 51.99 g/mol.
It is given that number of moles is 11.9 moles.
Therefore, calculate the mass of chromium in grams as follows.
No. of moles =
mass in grams = No. of moles × Molar mass
= 11.9 moles × 51.99 g/mol
= 618.68 g
Thus, we can conclude that there are 618.68 g in 11.9 moles of chromium.
1mole ----- 52g Cr
11,9moles --- x
x = 11,9*52/1 = 618,8[g]
Answers
Answers
In the given question, the noble gas configuration for silicon is [Ne] 3s² 3p².
Noble gases are a group of chemical elements that are characterized by their low reactivity and stable electronic configuration. The six noble gases are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).
The noble gas configuration of an element is the electron configuration of the nearest noble gas element.
- In the case of silicon, the nearest noble gas to it is neon (Ne), which has an electron configuration of 1s² 2s² 2p⁶.
- To write the noble gas configuration for silicon, we first write the electron configuration of silicon, which is 1s² 2s² 2p⁶ 3s² 3p².
- Then, we look at the electron configuration of the nearest noble gas element, which is neon, and write its electron configuration in brackets, [Ne].
- Finally, we add the remaining electrons of silicon's electron configuration after the noble gas configuration.
Therefore, [Ne] 3s² 3p² is the noble gas configuration for silicon.
Learn more about noble gas here:
#SPJ6
The noble gas configuration of Silicon is [Ne] 3s23p2. The full electron configuration of silicon is 1s22s22p63s23p2. To find its noble gas shorthand, look at the full electron configuration and see how many filled shells there are. For silicon, all but the outermost shell is filled. So the number of filled shells is 2. Now look at the periodic table and find the noble gas at the end of the period the same as the number of filled shells. The noble gas at the end of Period 2 is neon, Ne.
(2) Aluminum reacts with sulfuric acid.
(3) Aluminum conducts an electric current.
(4) Aluminum has a density of 2.698 g/cm3 at STP.
Answers
The correct answer as to which statement describes a chemical property of aluminum would be that it reacts with sulfuric acid.
There are two properties of every substance - physical and chemical properties.
Physical properties refer to the characteristics that can be observed without altering the substance while chemical properties refer to the characteristics of undergoing chemical changes in reactions.
Physical properties include color, boiling and melting point, hardness etc., while chemical properties include reactivity, toxicity, flammability, etc.
All the options have to do with physical properties of aluminum except its reactivity with sulfuric acid. The equation of reaction is as follows:
Al + H2SO4 ---> Al2(SO4)3 + H2
More on the chemical properties of aluminum can be found here: brainly.com/question/536562
Answers
Answer:
Option B. Add 1.46 g of NaCl to 250 mL of H₂O
Explanation:
Analyse the data given: 250 mL and 0.10 M
The molar concentration and the volume of solution can indicate the moles of solute that were used.
Let's convert the volume from mL to L → 250 mL . 1 L /1000mL =0.250L
M . volume = moles → 0.10 mol/L . 0.250L = 0.025 moles
If we convert the moles to mass, we'll know the mass of solute:
0.025 mol . 58.4 g/mol = 1.46 g
Answer:
We have to solve 1.46 grams of NaCl in 250 mL H2O (option B)
Explanation:
Step 1: Data given
Volume = 250 mL = 0.250 L
Molarity NaCl solution = 0.10 M
Molar mass of NaCl = 58.4 g/mol
Step 2: Calculate moles NaCl
Moles NaCl = molarity * volume
Moles NaCl = 0.10 M * 0.250 L
Moles NaCl = 0.025 moles
Step 3: Calculate mass NaCl
Mass NaCl = moles NaCl * molar mass NaCl
Mass NaCl = 0.025 moles * 58.4 g/mol
Mass NaCl = 1.46 grams
We have to solve 1.46 grams of NaCl in 250 mL H2O (option B)