Atoms and Atomic Structure

An atom is electrically neutral overall because it has an equal number of protons, which are positively charged, and electrons, which are negatively charged. The positive charge of the protons in the nucleus balances the negative charge of the electrons surrounding the nucleus. Therefore, when these charges are combined, the total electrical charge of a neutral atom is zero. However, if an atom gains or loses electrons, it can become an ion, resulting in a net positive or negative charge.

The paramecium is held together by a rigid outer covering called the pellicle, which is composed of protein and other substances. This structure provides shape, protection, and support while allowing flexibility for movement. The pellicle is important because it helps maintain the integrity of the cell in various environments and facilitates the organism's ability to move and interact with its surroundings. Additionally, it plays a role in osmoregulation, preventing the cell from bursting in hypotonic conditions.

The electron configuration 1s² 2s² 2p⁴ corresponds to the element with the atomic number 16, which is sulfur. The symbol for sulfur is "S."

Calcium

The element that has half as many protons as zinc would be copper. Zinc has 30 protons, while copper has 29 protons. This means that copper has one less proton than zinc, making it the element with half as many protons.

The Nitrogen atom has 5 valence electrons and with three bonded e's it has one lone pair (2 left over ) which it donates to the Boron atom to coordinately bond with B to form F2HNBF3. The boron atom is also partially positive due to the more electronegative flourine atoms

Well, darling, that electron configuration belongs to the halogen group on the periodic table. They're a bunch of highly reactive elements just looking to snatch up an electron to achieve a full outer shell. Watch out for these troublemakers!

For complete combustion of methane (CH4) to carbon dioxide (CO2) and water (H2O), two molecules of oxygen (O2) are needed for each molecule of methane. This balanced chemical equation is represented as:

CH4 + 2O2 -> CO2 + 2H2O.

Proton and neutron has a size of 10-13 cm (approx. 1,5-2 fm).

The diameter of the electron may be cca. 10-17 m but this is only a calculated value and is not very sure.

In earlier times, Sulfur or Brimstone, was use widely my the Chinese for gunpowder in around the year 1044.

BUT Antoine Lavoisier agued that it was an element NOT a compound in the year 1777.

32

Well, isn't that just a happy little question! The six ions that have the same electron configuration as Ne are He+, Li2+, Be3+, B4-, C5+, and N6-. They all have 10 electrons arranged in the same configuration as Neon, bringing a sense of harmony and balance to the world of chemistry. Just like painting a beautiful landscape, understanding these ions can bring a sense of peace and joy to your scientific endeavors.

The mass of an electron is approximately 9.11 x 10^-31 kilograms, which is incredibly small compared to the mass of a proton or neutron. For example, a proton has a mass of approximately 1.67 x 10^-27 kilograms, which is over 1800 times greater than the mass of an electron. This significant difference in mass is a key factor in the behavior of atoms and the interactions between subatomic particles.

18.

Phosphorus has an atomic number of 15, therefore it has 15 protons. Phosphorus-33 has a total of 33 protons and neutron and therefore has 18 neutrons.

Phosphorus-33 is a synthetic unstable isotope of P.

There are three subatomic particles:

1. Proton - found in the nucleus which is at the centre of the atom

2. Neutron - found in the nucleus which is at the centre of the atom

3. Electron - found in the shells which surround the nucleus

8

2xN=2 Nitrogen atoms

+

2xH3=6 Hydrogen atoms

=8 total atoms

Oh, dude, 2NaCl has a total of 12 atoms. Each NaCl molecule consists of one sodium atom (Na) and one chlorine atom (Cl), so when you have 2NaCl, you've got 2 sodium atoms and 2 chlorine atoms. That's like, basic chemistry, man.

A gold coin with a diameter of 1 centimeter and a 1 mm thickness has a volume of .07854 cubic centimeters. Gold has a density of 19.30 grams per cubic centimeter. There is 1.5158 grams of gold or 7.7 millimoles or 4.637 E21 atoms.

look its easy. if you have X moles of Ca you would look it up in the elements chart and figure it out right? now all you have to do is figure out how many moles do you get of each element in the compound above and sum them up. if it still doesnt help post on my message bourd ok?