# Posts by timmy123

Total # Posts: 10

Algebra 2
How do you solve x + x + x√2=10? I did x^2 + x^2 + 2x^2 = 100 4x^2 = 100 How do I continue?

Algebra 2
What is the conjugate of (2√5 + 3√2)/2? How do you find it?

Algebra 2
When you solve (√3n+10) - 4 = n, are the solutions n=-3 and n=-2. You don't have to reject any solutions, right?

Algebra 2
How do you solve 7- ³√9c = 4?

Chemistry
thanks

Chemistry
Atom A- 6 protons, 6 electrons, 7 neutrons Atom D- 6 protons, 6 electrons, 8 neutrons Atom X- 7 protons, 7 electrons, 8 neutrons Atom Z- 8 protons, 8 electrons, 9 neutrons Which two atoms are isotopes of the same element? a. A and D b. A and Z c. X and D d. X and Z How am I ...

Chemistry
thanks

Chemistry
Did I answer these correctly? 1. What is the total number of principal energy levels or shells in an atom with an atomic number of 30? a. 3 b. 4 c. 5 d. 6 I choose b. 2. The electron configuration of an atom in the ground state is 2-4. The total number of occupied principal ...

Chemistry
How does the N = 2 shell contain 10 electrons?

Chemistry
An atom contains a total of 25 electrons. When the atom is in the ground state, how many different principal energy levels will contain electrons? a. 1 b. 2 c. 3 d. 4 I really don't get this because I thought energy levels went like 2, 8, 18, 32, and 50, but 25 is between ...

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