Answer:
4,1,4
Explanation:
Balancing a synthesis equation
Answer:
- <em><u>A. isotopes </u></em>
<em><u></u></em>
Explanation:
The <em>periodic table</em> was organized by Dimitry Mendeleiev by 1869, as he showed the connection between the atomic mass and the properties of the elements.
Nevertheless, the order of some few elements had to be altered because the properties did not follow the order of the atomic masses.
Henry Mosely by 1913 determined that atoms of a same element had different number of neutrons, leading to different atomic masses. These atoms of a same element (with the same number of protons) with different number of neutrons are known as<em> isotopes.</em>
By arranging the elements in increasing order of the number or protons (atomic number), instead of the atomic masses, all the elements resulted ordered according with a repetitive (periodic) pattern of chemical properties.
<h2>Answer:</h2>
The volume of water measured using the graduated cylinder is <em>not exactly identical </em> identical to the volume calculated.
<h3>Explanation:</h3>
Calculated volume is theoretical value calculated from the density and mass of water.
But volume measured in cylinder can contain the personal error of individual.
Because in graduated cylinder volume is measured in a specific way that is:
- Place the graduated cylinder on a flat surface and view the height of the liquid in the cylinder with your eyes directly level with the liquid.
- The liquid will tend to curve downward.
- This curve is called the meniscus.
- Always read the measurement at the bottom of the meniscus.
Answer:
The importance of significant figures
As stated before, it is important within the science fields that you are not more precise or accurate than the least accurate or precise number. In science, it is generally agreed upon that the last number digit in any figure is filled with uncertainty.
Explanation:
