Question

1. Which of the following has the largest mass? a. electron b. proton c. α particle...

1. Which of the following has the largest mass?

a. electron

b. proton

c. α particle

2. β particles emitted from radioactve nuclei have

a. a larger mass than an a particle

b. the same mass as an electron

c. a smaller mass than electrons

3. Most radioactive elements have

a. More protons than neutrons

b. more electrons than protons

c. more neutrons than protons

4. In nature, one element can change to another by the process of

a. covalent bonding

b. combustion

c. radioactive decay

5. the half-life of a radioactive element is

a. the time it takes for half the protons in a radioactive nucleus to be lost

b. the time it takes for half the radioactive nuclei in a sample to decay

c. the time it takes for half the neutrons in a radioactive nucleus to be lost

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

1.

Mass of electron = 9.1*10^-31 kg

Mass of electron = 1.67*10^-27 kg

Mass of alpha particle = 6.64*10^-27 kg

So correct option is C.

2.

Beta particle have same mass as electron.

Since during beta decay consists of electron and neutrino. And neutrino are massless.

Correct option is B.

3.

Most radioactive elements have more neutron than protons. So after a nucleus loses neutrons, it balances nucleus.

Correct option is C.

4.

In nature, one element can change to another by the process of Radioactive decay.

By losing a neutron or proton element changes in to another.

Correct option is C.

5.

the half-life of a radioactive element is 'the time it takes for half the radioactive nuclei in a sample to decay'

Correct option is B.

Please Upvote.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
What is half-life of a radioactive element? The time taken for the parent element to disappear....
What is half-life of a radioactive element? The time taken for the parent element to disappear. The time taken for half of the original number of nuclei to decay The time taken for the volume of a sample to reduce to half its original value The time taken for the mass of a sample to reduce to half its original value. The number of electrons in a normal atom is the same as: (i)    the number of protons in its...
A helium nucleus (called an alpha particle) contains 2 neutrons and 2 protons with no electrons....
A helium nucleus (called an alpha particle) contains 2 neutrons and 2 protons with no electrons. If any electrons are added, there is a negligible amount of mass added but obviously one negative charge per electron is added. Three particles are injected into a constant B-field of 2T at a velocity of 3×106ms. The first particle is only the alpha particle (He++), the second particle is a nucleus with 1 electron (He+), and the third particle is a nucleus with...
1. True or False? It is possible for a common hydrogen nucleus to emit an alpha...
1. True or False? It is possible for a common hydrogen nucleus to emit an alpha particle. Hint: An alpha particle is a helium nucleus with two protons and two neutrons. A common hydrogen nucleus has only one proton and no neutrons. (a) True (b) False. 16. X-rays are most similar to which of the following: (a) alpha particles (b) beta particles (c) gamma rays 2. True or False? All isotopes of the same element have a different number of...
Which one of the following processes is considered radioactive decay? A) a neutron collides with a...
Which one of the following processes is considered radioactive decay? A) a neutron collides with a uranium nucleus and breaks it into two pieces B) a photon strikes a metal surface and causes an electron to be emitted C) a proton and an alpha particle collide and form a new nucleus D) a nucleus spontaneously emits a particle E) single-celled organisms absorb nuclear particles
Which of the following are valid regarding radioactive decay? If a statement is invalid, write a...
Which of the following are valid regarding radioactive decay? If a statement is invalid, write a brief statement indicating why. (a) It obeys an exponential decay according to N(t) = N0e − t τ = N0 2 t/t1/2 (b) It involves three types of decay: α, β, γ in which α, β, and γ ray particles are emitted in the decay. Their identities were unknown at the time of their discovery. (c) α rays are really negatively charged Helium nuclei...
2. Fine structure constant α, for electrons defined as α≡v/c where v is the speed of...
2. Fine structure constant α, for electrons defined as α≡v/c where v is the speed of electrons around the atomic nucleus and c is the speed of light. The negative Muon particle (μ-) is a subatomic particle that has the type and magnitude of the charge equal to an electron, but has a mass 207 times the mass of the electron. These negative muons can be attracted by protons and form hydrogen-like structures called muonic hydrogen atoms. Determine: a. The...
(1) Which statements are TRUE concerning particles that make up atoms? I. The mass comes solely...
(1) Which statements are TRUE concerning particles that make up atoms? I. The mass comes solely from the neutrons. II. The atomic number of a neutral atom equals the number of electrons and the number of protons. III. The protons and the neutrons are contained in the nucleus A. I and II B. I and III C. II and III D. I, II, and III (2). Which statement is FALSE? A. The atoms in ammonia are joined by covalent bonds....
Match each of the words below with the appropriate definitions. A   atomic mass B   ion C...
Match each of the words below with the appropriate definitions. A   atomic mass B   ion C   molecule D   atomic number E   neutrons F   electrons G   protons H   nucleus I   electron cloud The parts of an atom that have a negative charge. The central core of an atom. The part of an atom that contains the negatively charged particles. The parts of an atom that have no charge. The part of an atom that contains the neutrons. The biggest part (size...
Aston’s measurements with mass spectrograph showed that the mass of the carbon-12 nucleus was ______________________the mass...
Aston’s measurements with mass spectrograph showed that the mass of the carbon-12 nucleus was ______________________the mass of 12 hydrogen nuclei. slightly less than,   exactly equal to slightly more than none of this 10 points    QUESTION 2 Aston’s work showed that nuclei in the middle of the periodic table_____________ than the lightest and heaviest nuclei are more loosely bound            are more tightly bound have more isotopes                    are more abundant 10 points    QUESTION 3 As a result of Aston’s work,...
One of the many fundamental particles in nature is the muon mu. This particle acts very...
One of the many fundamental particles in nature is the muon mu. This particle acts very much like a "heavy electron." It has a mass of 106 MeV/c^2, compared to the electron's mass of just 0.511 MeV/c^2. (We are using E = mc^2 to obtain the mass in units of energy and the speed of light c). Unlike the electron, though, the muon has a finite lifetime, after which it decays into an electron and two very light particles called...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT