7. Give me an atom with the following characteristics.
Halogen
Halogen
Alkali metal
Boron
Lanthanide series
Alkaline Earth metal
Nobel gas
Transition metal
Help po Theres no point po if u just want to take my point cause i could just report u and it will be negative pts^-^ so please answer me the right answer thank you in advance^,^
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Answer:
1.Halogens are highly reactive, and they can be harmful or lethal to biological organisms in sufficient quantities. This reactivity is due to high electronegativity and high effective nuclear charge. Halogens can gain an electron by reacting with atoms of other elements. Fluorine is one the most reactive elements.
2.Characteristics of alkali metals are:
High reactive metals.
Not found freely in nature.
Stored in a mineral oil solution.
Low melting points.
Low densities (lower than other metals)
Low electronegativity.
Low ionization energy.
React easily with halogens.
3.Chemical properties of boron - Health effects of boron - Environmental effects of boron
Atomic number 5
Density 2.3 g.cm-3 at 20°C
Melting point 2076 °C
Boiling point 3927 °C
Vanderwaals radius 0.098 nm
4.