Answer: Why do all the members of a group have similar properties? They have similar properties, because they share similar amounts of electrons in their outer shell, valence electrons! This means they will only be able to interact with other elements with those electrons so they often show similar properties.
Explanation:
Al = 26.981539u which rounds up to 27u
Ca= 40.078u which sounds to 40u
Sodium= 22.989769 which rounds up to 23u
Potassium= 39.0983u which rounds to 39u
Nitrogen= 14.0067u which rounds to 14u
Silicon= 28.0855 u which rounds to 28u
Iron= 55.845 u which rounds to 56u
Hydrogen= 1.00784 u which rounds to 1
I hope this helps!!
A molecule consists of two or more atoms united by a bond
Answer:
Hi
Explanation:
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₈O¹⁸ + ₁¹H(proton) ⇒ ₉F¹⁸ + ₀n¹(neutron) + ₀γ⁰
(gamma)
<h3>Further explanation</h3>
Given
Fluorine-18
Oxygen-18
Required
Nuclear equation
Solution
Radioactivity is the process of unstable isotopes to stable isotopes by decay, by emitting certain particles,
- alpha α particles ₂He⁴
- beta β ₋₁e⁰ particles
- gamma particles ₀γ⁰
- positron particles ₁e⁰
- neutron ₀n¹
The principle used is the sum of the atomic number and mass number before and after the decay reaction is the same
The reaction
₈O¹⁸ + ₁¹H(proton) ⇒ ₉F¹⁸ + ₀n¹(neutron) + ₀γ⁰
(gamma)