14. Answer;
-There are two potassium ions for each ion of sulfur.
Explanation;
The formula K2S indicates that there are two potassium ions for each ion of sulfur.
-K2S is the formula of potassium sulfide.
- From the formula; two potassium atoms combines with 1 atom of sulfur to form the compound. In other words the ratio of potassium and sulfur atoms in the compound is 2 : 1.
15. Answer;
-Lithium fluoride
Explanation;
-Fluorine, F, forms a binary ionic compound with lithium, Li. The name of the compound is lithium fluoride.
- A compound is a substance that is formed when two or more atoms from different elements are chemically bonded. For example Lithium fluoride is a compound that is made of fluorine atom and lithium atom that are chemically combined.
16. Answer;
-Carbon-12 atom
Explanation;
The standard on which the atomic mass unit is based is the mass of a carbon-12 atom.
-Atomic mass is the quantity of matter contained in an atom of an element. -The atomic mass is expressed as a multiple of one-twelfth the mass of the carbon-12 atom, which is assigned an atomic mass of 12 units.
17. Answer;
- Non-metal fluorine
Explanation;
-Two highly reactive elements in Period 2 are the metal lithium and the non-metal fluorine.
-Elements in period 2 often have the most extreme properties in their respective groups. Fluorine is the most reactive halogen, neon is the most inert noble gas, and lithium is the least reactive alkali metal, but the most reactive metal in group 2.
The answer is "A magnetic field influences the motion of charged particles. The negatively-charged particles will experience a force acting against their motion, so the negatively-charged particles would slow down and stop moving."
This is because for example;
Have you ever seen a magnet? If so, you would experience the same scienario as above.
C. white light
Explanation:
All the visible color light waves are seen together and makes up a white light.
Visible light is made up of different colors and when they join together they are seen as the white light around us.
- During rainbow formation, we see the different colors of light that makes up a white light.
- when white light passes through a glass prism, the velocity and wavelength changes and we can see the different components of light.
learn more:
electromagnetic waves brainly.com/question/12450147
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