Answer:
Br⁻, Be²⁺, Li⁺ , O²⁻, N³⁻
Explanation:
Ions are formed when an atom lose or gain the electrons.
There are two types of ions.
Cations and anions
Cations:
When an atom lose the electron cations are formed and atom gain positive charge.
X → X⁺ + 1e⁻
Anion:
When an atom gain electron anion is formed and atom gain negative charge,
X + 1e⁻ → X⁻
In given list of elements Li and Be form positive ions because they easily lose their valance electrons.
Li → Li⁺ + 1e⁻
Be → Be²⁺ + 2e⁻
While oxygen, nitrogen and bromine gain the electrons easily to complete the octet and form negative ions.
Br + 1e⁻ → Br⁻
O + 2e⁻ → O²⁻
N + 3e⁻ → N³⁻
Answer:
At the Earth's surface, wind blows horizontally from high pressure to low pressure areas. The speed is determined by the rate of air pressure change, or gradient, between the two pressure areas. The greater the pressure difference, the faster the winds.
- sciencing
The Four Forces That Influence Wind Speed & Wind Direction
Explanation:
35.453 (chlorine) + 10.811 (boron) = 46.264
Ophelis was painted by a British artist named, Sir John Everett. It was first completed in 1852 starting from 1851.