Answer: Option (c) is the correct answer.
Explanation:
A particle that contains two protons and two neutrons bounded together is known as an alpha particle.
It is known that an alpha particle has a large mass and due to this they travel very slowly. As a result, they tend to have low velocity.
Hence, we can conclude that alpha particles cannot penetrate deeply into solids because they have low velocity.
Answer:
D. The ionic number.
Explanation:
Whenever an element losses or gains an electron; it becomes charged, thus turns to an ion. The ion can either be positively charged when it losses an electron or negarively charged when it gains an electron. The number shows the required number of electrons gained (negative) or lost (positive).
Answer:
Leo Hendrik Baekeland
Explanation:
Baekeland discovered Bakelite, the first successful plastic, but wanted to make a more better and more heat resistant plastic.
Fe + heat ----> Fe_54 + + neutrons
Amount of sugar in a sugar bowl is 0.75 cups
Continuous
