For alpha and beta decay it does because the proton number changes.
During gamma, there is no change of identity, just energy
Answer:
Non-metals
Explanation:
Covalent bonds usually occur between nonmetals. For example, in water (H2O) each hydrogen (H) and oxygen (O) share a pair of electrons to make a molecule of two hydrogen atoms single bonded to a single oxygen atom.
Answer: Metals found as native minerals in nature are not highly reactive
Explanation:
Native minerals refers to minerals that are found in nature in their pure metallic form such as gold. Iron and aluminum are highly reactive metals. Highly reactive metals are far up in the activity series of metals, they have a great tendency towards oxidation. On the other hand, noble metals have less tendency towards oxidation and are found close to the bottom of the activity series for example, gold.
Answer:
Explanation:
MM: 74.09 136.14
H₂SO₄ + Ca(OH)₂ ⟶ CaSO₄ + 2H₂O
m/g: 4.53
1. Theoretical yield
(a) Moles of Ca(OH)₂
(b) Moles of CaSO₄
(c) Theoretical yield
2. Percent yield
Answer:
The correct answer is - 15 hours.
Explanation:
Half-life an element is the time required to decay the half amount of the initial amount of the element and is represented by t1/2.
The formula for the calculating initial amount
n(i)=n(r)⋅2^n
where
n(i) - the initial number of moles of element
n(r) - the number of moles remained amount after the given time
n - the number of periods,
= time T, where T is the half-life.
n(i)=n(r)⋅2^n
n(i)/n(r) =2^n
1/16 =2^n
n= 4
The half life = 60/n
= 60/4
= 15 hours.
