Explanation:
speed of light= c
wave length= L
frequency= f
c=Lf → L= c/f → L= 3 × 10⁸/ 27 × 10⁹ → L = 1/90 ≈ 0.011 m
Answer:
Starts on Saturday, June 1
and ends on
Saturday, November 30
Explanation:
Lose electrons because they have a negative charge.
Boron Group
elements have three valence electrons and are fairly reactive. All of them are solids at room temperature. Boron is a very hard, black metalloid with a high melting point.
Answer: I have no idea either i need help aswell
Explanation:
