Answer:
Explanation:
(4) A does not burn in air, and B does burn in air is your answer. Flammability is a chemical property while the rest of these are physical properties.
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Answer:
a) the atomic number is 15
b) the mass number is 15+16 = 31
c) element is phosphorus
d)Group 15 period 3
Answer:
Mass = Number of neutrons + Atomic number (aka number of protons)
Explanation:
Answer:
its letter b
Explanation:
it represents the spectrum of stars
