tasha7121
05.03.2021 •
Mathematics
Based on information from the periodic table, what does this image represent? HE 4 Protons e 5 Neutrons = 2 Electrons A. A negatively charged beryllium ion
B. A neutral boron atom
C. A neutral beryllium atom
D. A positively charged beryllium ion
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Ответ:
D. A positively charged beryllium ion
Ответ:
Answer : Rotation of a point through 180°, about the origin when a point X (3, 4) is rotated about the origin O through 180° in anticlockwise or clockwise direction, it takes the new position X' (-3, -4).