1. Questions

Science

1. Which statement about subatomic particles is NOT true? (1 point)

Protons and neutrons have almost the same mass.
Protons and electrons have opposite charges.

Unlike protons and electrons, neutrons have no charge.

Protons and neutrons have the same charge.

2. Which of the following is unique for any given element? (1 point)

the number of neutrons

the charge on the electrons

the number of protons

the mass of a neutron

3. Suppose an atom has a mass number of 35. Which statement is true beyond any doubt? (1 point)

The atom has an odd number of neutrons.

The atomic number is less than 17.

The atom is not an isotope.

The number of protons in the nucleus
does not equal the number of neutrons.

5. In Rutherford’s gold foil experiment, some of the____________________aimed at gold atoms bounced back, suggesting that a solid mass was at the center of the atom. (1 point)

6. Neutrons and_______________have almost the same mass. (1 point)

7. Which of the three subatomic particles—proton, electron, or neutron—has the least mass? (1 point)

8. If an atom has 32 protons and 38 neutrons, what is its mass number? (1 point)

9. Most calcium atoms have an atomic number of 20 and a mass number of 40, but some calcium atoms have a mass number of 48. What word could you use to describe these two kinds of calcium atoms? (1 point)

10. In the nucleus of an atom, there are 15 protons and 16 neutrons. What is the atomic number of this isotope? (1 point)

  1. 👍 0
  2. 👎 0
  3. 👁 1,126
Chelsea

  1. We don't do your homework for you. We will be happy to help you get started if you show us what you don't understand. Pick ONE problem and tell us what you are having trouble with. Then we can talk about the other nine.

    1. 👍 1
    2. 👎 4
    DrBob222

  2. I need information on plants. "Explain the roles different parts of a plant have in converting light energy into chemical energy." I need to teach this to a special education child in as simple terms as is possible. Can you tell me some sites I can look at to find information so I can acclamate the information into simpler words for understanding for the "APA" reports for the state of New Jersey.

    1. 👍 0
    2. 👎 0
    Cheryl

  4. hi im a russian ?/ i got a myspace if u wanna add me(:
    well my sissys name is alesia she has poofy hair
    my nane

    1. 👍 0
    2. 👎 1
    christinachka

Respond to this Question

First Name

Your Response

Similar Questions

  1. Science

    1.Which of the following best describes an atom? A protons and electrons grouped together in a random pattern B protons and electrons grouped together in an alternating pattern C a core of protons and neutrons surrounded by

  2. chemistry

    which element has 16 protons, 17 neutrons, and 16 electrons? Look on the periodic table. It is element number 16 since that is the number of protons and electrons. I know sulphur has 16 of each. However, it might be an isotope of

  3. Science

    The Composition of Atoms Quick Check questions and answers Science 8 A Unit 3: Matter Interactions A. A model of an atom shows eight electrons in rings that represent different energy levels. How many electrons are in each energy

  4. science

    Which statement about subatomic particles is true? A. Protons, neutrons, and electrons all have about the same mass. B. Unlike protons or neutrons, electrons have no mass. C. Neutrons have no charge and no mass. D. An electron has

  1. Science

    if an atom has 17 electrons and its mass number is 35, calculate the following: number of protons, atomic number, and number of neutrons. i think there would be: an atomic number of 17, there would be 17 protons, and there would

  2. Chemistry

    Which of the following are key parts of Dalton's Atomic Theory (Click the 4 that apply)? (1 point) All elements are composed of tiny indivisible particles called atoms*** Atoms of the same element are identical. The atoms of any

  3. science help plzzz

    Which of the following best describes an atom? A protons and electrons grouped together in a random pattern B protons and electrons grouped together in an alternating pattern C a core of protons and neutrons surrounded by

  4. science

    1.the modern atomic model includes orbiting the nucleus. which of the following parts of dalton's was disproved by the discovery of the electron atoms are tiny particles atoms cannot be divided into smaller parts atoms have

  1. science

    HELP ME !!!!!!! What is the atomic number of an atom?(1 point) the number of particles in the nucleus the number of protons the number of neutrons the number of particles outside the nucleus Which statement about an atom is

  2. Science Help!

    Lisa studied the models of three carbon nuclei shown below. She listed information about the carbon nuclei in a table. Name Carbon 12 number of protons 6 number of neutrons 6. Name Carbon 13 number of protons 6 number of neutrons

  3. Biology HELP!

    1. Which of the following correctly identifies the composition of an oxygen atom? (1 point) 8 protons, 8 electrons, and 8 neutrons 6 protons, 6 electrons, and 6 neutrons 8 protons, 6 electrons, and 7 neutrons 6 protons, 6

  4. science.

    Protons are positively charged and repel other protons. Which other particle is found in the nucleus and separates protons so that the strong force can hold the nucleus together? A) electrons B) neutrons C) protons D) quarks

You can view more similar questions or ask a new question.