The first man-made element or artificial element which is produced because it is not found naturally in nature is Technicium, in 1937. Technicium has an atomic number of 43 and atomic mass of 98 g/mol.
Answer:
The frequency
Step-by-step explanation:
The formula for the energy of an electromagnetic wave is
E = hf Thus,
E ∝ f and
f ∝ E
C. The particles that make up material A have more mass than the particles that make up material B.
That it's absorbing all the other colors but reflecting blue light. You see white light is actually a bunch of colors all together. When you see a rainbow it's just light being split to it's original components. For our eyes to see we need light to enter it. And we see color because an object is absorbing all the other colors and reflecting just one color light (in this case blue). The color light that is being reflected is the one that travels into our eyes allowing us to see color!