Percentage of Sodium [Na] in Sodium Carbonate [Na2CO3] = 46/106 x 100 = 43.40%.

Molar mass is the mass (in grams) of one mole of a compound. 1 CH4 Molecule equals 1 C atom and 4 H atoms; 1 Carbon = 1 X 12.01 g/mole = 12.01 g/mole + 4 Hydrogens = 4 X 1.01 g/mole = 16.05 g/mole which is the molar mass.

1: Balancing Equations. You cannot change subscripts in a chemical formula to balance a chemical equation; you can change only the coefficients. Changing subscripts changes the ratios of atoms in the molecule and the resulting chemical properties.

Chemists effectively count atoms by weighing matter. When balancing a chemical equation, you need to change subscripts to make the number of atoms of an element the same on both sides of the equation.

Elemental composition of Na2CO3(washingsoda)

22.989769 u

Sodium is a chemical element with the symbol Na (from Latin natrium) and atomic number 11. It is a soft, silvery-white, highly reactive metal.

Copper (Cu)

The name derives from the Latin cuprum for Cyprus, the island where the Romans first obtained copper. The symbol Cu also comes from the Latin cuprum. From the Latin word cuprum, from the island of Cyprus. It is believed that copper has been mined for 5,000 years.

8 Fun Facts About Silver

• Silver is the most reflective metal.
• Mexico is the leading producer of silver.
• Silver is a fun word for so many reasons.
• Silver has been around forever.
• It is good for your health.
• Silver was used a lot in currency.
• Silver has the highest thermal conductivity of any element.
• Silver can make it rain.

107.8682 u

Lanthanoid, also called lanthanide, any of the series of 15 consecutive chemical elements in the periodic table from lanthanum to lutetium (atomic numbers 57–71). With scandium and yttrium, they make up the rare-earth metals.

9.012182 u

beryllium

For most elements other than hydrogen, isotopes are named for their mass number. For example, carbon atoms with the usual 6 neutrons have a mass number of 12 (6 protons + 6 neutrons = 12), so they are called carbon-12. Carbon atoms with 7 neutrons have an atomic mass of 13 (6 protons + 7 neutrons = 13).

Together, the number of protons and the number of neutrons determine an element’s mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number.

The mass number of an atom is its total number of protons and neutrons. Atoms of different elements usually have different mass numbers , but they can be the same. For example, the mass number of argon atoms and calcium atoms can both be 40.

The atomic mass is the weighted average mass of all the isotopes of an element. If we round off the atomic mass to the nearest whole number and subtract the atomic number from it, we get the number of neutrons. That is, number of neutrons = atomic mass (rounded to nearest whole number) – atomic number.

To calculate the number of neutrons in the nucleus of an atom is simple. You take the atomic, or proton number of the element, and you subtract it from the element’s mass number. For example, take the isotope of copper, Cu-63. It contains 29 protons and has a mass number of 63, as suggested in the name.

Answer: no we can’t find, only one kind of atom is there which we can identify without knowing number of neutrons in it it is a kind of a hydrogen isotope naming protium.

The mass number is the sum of protons and neutrons. This means to find the number of neutrons you subtract the number of protons from the mass number. On the periodic table, the atomic number is the number of protons, and the atomic mass is the mass number.

6 neutrons