Answer:
(a) ¹⁴₆ C ⇒ ¹⁴₇ N + ⁰₋₁ e
(b) ¹⁴⁰₅₅ Cs ⇒ ¹⁴⁰₅₆ Ba + ⁰₋₁ e
(c) ²³⁴₉₀ Th ⇒ ²³⁴₉₁ Pa + ⁰₋₁ e
Explanation:
In a beta decay the nuclide emits a beta particle which are high enery electrons. The number of neutrons decreases by one and the atomic number increases also by one moving the nuclide one place to the right in the periodic table. The mass of the nuclide does not change since the mass of electron is negligible compared to the proton and neutron.
(a) ¹⁴₆ C ⇒ ¹⁴₇ N + ⁰₋₁ e
(b) ¹⁴⁰₅₅ Cs ⇒ ¹⁴⁰₅₆ Ba + ⁰₋₁ e
(c) ²³⁴₉₀ Th ⇒ ²³⁴₉₁ Pa + ⁰₋₁ e
The first man-made element or artificial element which is produced because it is not found naturally in nature is Technicium, in 1937. Technicium has an atomic number of 43 and atomic mass of 98 g/mol.
The answer is false. When you add an acid or base in amounts greater than the buffer capacity you no longer have the buffer to influence solution pH
Answer:
0.1g/ml
Explanation:
0.1 g/ml = 100kg/m³
The difinition of density is mass per volume.
⇒So you have 5 grams of water which occupies a volume of 50 milliliters. This gives us : 5g / 50ml = 0.1g/ml
In Si- units 0.1g/ml = 100kg/m³