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Answers
Answer:
answer 1
ATOMIC NUMBER SYMBOL NAME
83 bi bismuth
107 bh bohrium
5 b boron
35 br bromine
ANS 2
For example, Pb is the symbol for lead (plumbum in Latin); Hg is the symbol for mercury (hydrargyrum in Greek); and He is the symbol for helium (a new Latin name) because helium was not known in ancient Roman times.
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Symbols for chemical elements.
Z 2
Symbol He
Name Helium
Origin of name Greek hḗlios, 'sun'
Group 18
ans 3
Monatomic gas, gas composed of particles (molecules) that consist of single atoms, such as helium or sodium vapour, and in this way different from diatomic, triatomic, or, in general, polyatomic gases.
ans 4
Diatomic molecules are composed of only two atoms, of either the same or different chemical elements. Common diatomic molecules include hydrogen (H2), nitrogen (N2), oxygen (O2), and carbon monoxide (CO). Seven elements exist as homonuclear diatomic molecules at room temperature: H2, N2, O2, F2, Cl2, Br2, and I2.
ans 5
The divalent elements, calcium, magnesium, phosphorus, as well as iron, zinc, and copper were determined in clinical chemistry analyzer
Answer:
(1.) boron,barium
(2.)helium,lithium
(3.) neon,argon
(4.) oxygen, hydrogen
(5.) oxygen,sulphur
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