Answer:
B. 3.0 g/ml
Explanation:
density formula: mass/volume
15/5=3
Answer:
8 neutrons
A is the number of neutrons plus protons in the nucleus. However, we already know that there are 7 protons. Therefore, there must be 8 neutrons in the nucleus to add up to 15. Table 3.
Element Symbol Number of Neutrons
carbon 146C 8
nitrogen 147N 7
157N 8
oxygen 168O 8
Explanation:
Answer:
The atomic mass of radon is 222.
Explanation:
. That means that one mole of radon weighs 222 grams (222 grams/moles). We can therefore make the following equation:
Grams × (1/222) = Moles of Radon
The answer is option e that is e. Iron and magnesium.
Dark silicates have a specific gravity of 3.2 to 3.6 and are composed primarily of silica tetrahedral and iron and magnesium.
Iron and magnesium is a component of dark silicates that have a specific gravity of 3.2 to 3.6.
So the answer is iron and magnesium.
Answer: electron on the shell of the atom
Explanation: that what I trying to remember
