Example: A sodium atom contains 11 protons, so its atomic number is 11. Mass number is the total of the protons and neutrons together, and it is given the symbol A. Example: A sodium atom contains 11 protons and 12 neutrons; its mass number A is 23<span>.</span>
<u>Answer:</u> The correct answer is Option B.
<u>Explanation:</u>
Molar mass is defined as the mass (in grams) of 1 mole of a substance. It is expressed in grams per mole.
Phosphorous is the 15th element in the periodic table, which belongs to Group 15 and Period 3. The molar mass of phosphorus element is 30.97 g/mol.
Hence, the correct answer is Option B.
Answer:
electrons
Electrons are negatively charged particles that orbit the nucleus. The number of electrons depends on the element and it is an ion or not
Answer:
gases
Explanation:
because the solid (steel) is the most dense, the gas (air) is the least dense, and the density of the liquid (water) is in between.
Answer:
Invention
Explanation:
Scientific ideas can be applied in novel was to solve new scientific problems and create new technology. This process helps to make life easier and better.
The application of scientific knowledge to solve new problems and create new technology is generally referred to as invention.
