Part I:
The atomic number of the sodium atom is 11. The atomic mass number can be estimated by rounding the atomic mass to 23. From this information, you can find the number of neutrons: 11 protons plus how many neutrons equals a mass number of 23? The number of neutrons would have to be the difference between 23 and 11, which is 12. This fact can be restated this way: 11 protons plus 12 neutrons equals a mass number of 23. For every proton in the nucleus, an electron revolves around the nucleus. Since 11 protons are in sodium, 11 electrons must be in sodium.
Using this information and the Periodic Table from lesson titled Periodic Table fill in the chart below.
Element Atomic Number Atomic Mass How many neutrons? How many electrons? How many protons?
Sodium 11 23 12 11 11
Chlorine
Carbon
Lead
Iron
Magnesium
Uranium
Cobalt
Calcium
Platinum
Phosphorus
Answer:
Chlorine - 17,35.45,18,17,17
Carbon - 6, 12.01,6, 6,6
Lead - 82, 207.2,125,82,82
Iron - 26, 55.847, 30, 26,26
Magnesium - 12, 24.305, 12,12,12
Uranium - 92, 238.09, 146,92,92
Cobalt - 27, 58.933,32, 27,27
Calcium - 20, 40.078, 20,20,20
Platinum - 78, 195.078,117, 78,78
Phosphorus - 15, 30.974, 16, 15,15
Explanation: https://hobart.k12.in.us/ksms/PeriodicTable/abc.htm
1. Double-Replacement reactions
2. Decomposition
3. Combustion
4. Syntesis
5. Single replacement
Given
Chemical equations
Required
Type of reaction
Solution
1. 2AgNO₃ + MgCl₂ ⇒ 2AgCl + Mg(NO₃)₂
Double-Replacement reactions. Happens if there is an ion exchange between two ion compounds in the reactant
2. 2KBr⇒2K +Br₂
Decomposition
Single compound breaks down in to 2 or more products
3. C₃H₈ + 5O₂ ⇒ 4H₂O + 3CO₂
Combustion
Hydrocarbon and Oxygen reaction and form water and carbon dioxide
4. NaO + H₂O ⇒ NaOH
Syntesis
2 or more reactants combine to form a single product
5. Zn + CuCl₂ ⇒ZnCl₂ + Cu
Single replacement
One element replaces another element from a compound
A chemist places a flask containing the reactant in an ice bath. This will decrease the rate of reaction.
Answer:
give them brainliest
Explanation:
By breaking a carbon double bond and adding chlorine.
By removing hydrogen because of chlorine’s attraction to hydrogen’s nucleus.
Chlorine and ethene do not react spontaneously.
Answer: option B m
Explanation:
It is an example for Electrophilic Addition of Halogen. And addition of Cl2 to Alkene is always Trans Addition. That means both cl atoms should add opposite side of double bond and results vicinal 1,2-dichloroethane as a product.
CH2=CH2 + Cl2-------> ClCH2CH2Cl