Answer:
All electromagnetic waves: are transverse waves; can travel through a vacuum ; travel at exactly the same speed in a vacuum, the speed of light, 300,000,000 m/s.
...
Like all waves, electromagnetic waves:
transfer energy from one place to another;
can be reflected;
Explanation:
14 as well. A neutral atom has just as many protons in its nucleus and electrons it is electronic shells.
Answer:
2p
Explanation:
Sodium has an atomic number of 11, thus, the neutral atom has 11 electrons. The electron configuration is:
Na: 1s² 2s² 2p⁶ 3s¹
To gain stability, it loses an electron from its outer shell to form the cation Na⁺. Its electron configuration is:
Na⁺: 1s² 2s² 2p⁶
If it were to lose a second electron to form a Na²⁺ cation, the electron should be lost from the 2p orbital subshell and its electron configuration would be:
Na²⁺: 1s² 2s² 2p⁵
Answer:
solid density = 3.85 g/mL
Explanation:
First we calculate the mass of the benzene:
benzene mass = 63.29 - 25 = 38.29 g
We know that density = mass / volume
So the volume of benzene will be:
volume = mass / density
volume = 38.29 / 0.880 = 43.51 cm³ = 43.51 mL of benzene (1 cm³ = 1 mL)
Now the volume of the sample will be:
sample volume = 50 - 43.51 = 6.49 mL
Now we can calculate the density of the solid:
density = mass / volume
solid density = 25 / 6.49 = 3.85 g/mL
<h2>Rocks are grouped according to their formation into three major groups – igneous, sedimentary, and metamorphic rocks
</h2>
Explanation:
- Based on their formation, rocks are further sub-grouped as:
- Igneous - Intrusive or extrusive
- Sedimentary – Clastic, chemical, or biologic rocks
- Metamorphic - Foliated and non-foliated
- Rocks are also grouped based on their properties like size, shape, texture, chemical composition, permeability, mineralogy, etc.
- Based on properties rocks are sub-grouped as:
- Igneous rocks – coarse or fine-grained; glassy or obsidian; felsic or mafic.
- Sedimentary rocks - conglomerate, sandstone, breccia, shale, siltstone, chalk, crystalline or fossiliferous limestone, gypsum, rock salt etc.
- Metamorphic rocks - Gneiss, hornfels, mylonites, cataclasties, marble, etc.
