91miketaylor
02.04.2021 •
Chemistry
An object is placed at a distance of 150 cm from a screen and a convex lens placed in between produces an image magnified \ times on the screen. Calculate the focal length and the position of the lens . please help me ASAP
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Ответ:
refer to explanation in order V
Explanation:
Atomic number: 54
Protons: 54
Electrons: 54
Neutrons: 77
Mass Number: 131.293 U
6 (1/2): At the upper left is the atomic number, or number of protons. In the middle is the letter symbol for the element (e.g., H). Below is the relative atomic mass, as calculated for the isotopes found naturally on Earth. At the very bottom is the name of the element (e.g., hydrogen).
6 (2/2): On the periodic table, the mass number is usually located below the element symbol.
I hope this helped!