Answer:
1. Alpha particles consist of two protons and two neutrons.
Explanation:
Alpha particles are generally produced in the process of alpha decay, a radio active decay in which an atom loses an helium atom.
AN alpha particle is identical to the helium particle. The helium particle has mass number of 4 and atomic number of 2. This means;
Number of protons = 2
Number of neutrons = Mass Number - Atomic Number = 2
The correct option is option 1.
Answer:
Ans: Across a row, the nuclear charge increases while the shielding effect of the inner core remains the same. According to Coulomb's law, increasing nuclear charge creates a greater force, so the valence electrons are held more tightly. The greater the ionization energy, the more difficult it is to remove an electron.
Explanation:
There are two types of adaptive immunity: active and passive. Active Immunity - antibodies that develop in a person's own immune system after the body is exposed to an antigen through a disease or when you get an immunization (i.e. a flu shot). This type of immunity lasts for a long time.
sorry if this didn't help!!
Answer:
Option 3 - Grignard reagents are strong bases and option 4 - Grignard reagents are strong nucleophiles
Explanation:
The carbon in grignard reagent has a very strong carbanionic character which gives grignard reaction it's unique characteristic of a strong base and strong nucleophile.
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