Which of the scientists found that uranium produced rays that can blacken a photographic plate even in the dark?

What compounds did Henri Becquerel work with to discover radiation?

What is Marie Curie famous for?

Marie Curie died of pernicious anaemia in 1967, a condition related to ___________ ?

Who is the only woman who received two Nobel Prizes?

What is radioactivity?

Radioactivity is spontaneous and random.

How many types of nuclear radioactivity are there?

Radioactivity is a random and spontaneous decay process of an unstable nucleus by emitting radioactive radiation. Radioactive radiation consists of all of the following radiation except :

What is units of radioactivity?

1 becquerel (Bq) is equal to?

Half life is the time taken for the number of undecayed nuclei to be reduced to _______ of its original number (value).

After the third half-life, how much of the sample is left?

How much time has passed after 3 half lives?

What is the half life of the material in this diagram?

What's the half life of this substance?

If a radioactive substance had a half life of 5 days, what fraction would be left after 20 days?

Iodin-131 decays with half-life is 8 days to become Xenon-131. Calculate the mass of Iodin-131 after 24 days with a mass of 60g

If you begin with 100 grams of a radioactive material, how much do you have after 2 half-lives?

Barium-122 has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10 minutes to set up an experiment using barium-122, how much barium-122 will be left when the experiment begins?

The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?

What is the half-life of iodine-131?

If the half life of a radioactive element is 100 years, how long would it take for the radioactivity to reduce by one half?

If the half-life of uranium-232 is 70 years, how many half-lives will it take for 10 g of it to be reduced to 1.25 g?

Which of the scientist introduced a theory on the structure of atom?

What are 3 subatomic particles in the structure of an atom?

A particle with a positive charge determines the element :

A particle with a negative charge determines the element :

When an atom loses or gains electron, the atom becomes a ___________ particle.

What do we call the tiny core at the center of an atom?

Neutral particle that is not charged is known as :

According to Dalton's Atomic Theory, an atom is the smallest particle and cannot be further ______________.

Which of the following atom is neutral?

Which two subatomic particles are found in the NUCLEUS of at atom?

What type of subatomic particles are found in the cloud?

If an atom has :

Number of protons : 29

Number of electrons : 27

What is the charge of this atom?