Which of the following is not an element: hydrogen, carbon, oxygen, water?

Q: An atom is composed of a central nucleus which is surrounded by which orbiting particles?

A: Atoms have a central nucleus  that is surrounded by one or more electrons (lightweight negatively…

Q: Which of the following is an acceptable atomic model for a neutral atom of carbon?

A:

Q: Which of water, iron, ammonia, chromium, radon, and silicon are chemical compounds as opposed to…

A: We have to write the chemical compounds as opposed to elements

Q: Choose the BEST answer to the following. When an element ejects a beta particle, the atomic number…

A: Answer:bi,e increases by 1.

Q: Which element has the lightest atoms?

A: The element that has the lightest atoms is hydrogen.

Q: What influence does the strong nuclear force have on the electrons in an atom? It attracts them…

A: Strong nuclear force is the binding force that acts as a glue holding the protons and the neutrons…

Q: Element X has 3 isotopes. One of the isotopes has a mass of 59.5 with an abundance of 43.3%. Another…

A: We know that, Average atomic mass of an element is a weighted average of all masses of all isotopes…

Q: A neutral atom of the element potassium (K) has A 19 protons. B. 20 neutrons. C. 39 electrons. 58…

A: No.of protons in an atom is determined by atomic number of that atom .

Q: If you have a sample of an element, it is made of atoms that all have the same number of which type…

A: To identify : The atoms in a sample of an element have the same number of which type of particlesin…

Q: What is the atomic number for the element platinum? 78 47 195 56

A: To determine Atomic number of element platinum

Q: Choose the best answer to the following: How many electrons are there in the third shell of sodium,…

A: Answer:  b

Q: The first scientist who was able to separate two isotopes of neon was O Henry Noseley Marie Curie…

A:

Q: Choose the BEST answer to the following. Which of these three elements has the most mass (a)…

A: The mass per nucleon for all the three elements is being evaluated for all the three elements as…

Q: What does the atomic number of an element tell you about the element?

A: Step 1Atomic number is the basic property of the element, it helps one identify the element. Atomic…

Q: Choose the BEST answer to the following. The neutrons in an atom are normally found (a) inside the…

A: Answer: ai,e  inside the nucleus.

Q: Elements that appear in the same column of the periodic table often share similar chemical…

A: "According to Bartleby guidelines for multiple question we can answer only one question. So, repost…

Q: The half-life of an element is 20 years. In how many years will there be 12.5% of the initial…

A:

Q: What is the most abundant element in the known universe?

A: There are 114 known elements in the universe.

Q: The mass of an atom is measured in atomic mass units. One atomic mass unit is equal to 1.66x10-27…

A: The masses of atoms and subatomic particles are very small.

Q: Will electrons collide with the nucleus due to their attraction. Give answer with reason

A: No, electrons will not collide with the nucleus due to their attraction. The reason of this…

Q: Choose the BEST answer to the following. When an element ejects an alpha particle, the atomic number…

A: Generally nuclear decay changes the number of protons in the nucleus of an atom and changes the…

Q: Marie and Pierre Curie were both winners of the Nobel Prize in physics. This prize is one of the…

A: Curie's family is known for their scientific  achievements and their Nobel prizes are confirmation…

Q: Fill in the blanks with the missing items. Refer to the periodic table of elements The first one…

A: We use the properties: Atomic number = no of electrons Atomic mass = no. of protons + no. of…

Q: State the changes in the values of the mass number and the atomic number of an element, when it…

A: Note : Since there are multiple question and as per guidelines we can provide solution to first…

Q: You could swallow a capsule of germanium without ill effects. But, if a proton were added to each of…

A: One can swallow a capsule of germanium without ill effects. Because it contains 32 protons…

Q: The different colours seen in exploding fireworks are produced using different elements. Element…

A: When a firework is exploded it reacts with oxygen. When it reacts with oxygen the electrons are…

Q: Element X has 2 isotopes. One of the isotopes has a mass of 18.9 with an abundance of 75.4%. The…

A: Given: Mass of the first isotope m1 = 18.9 with 75.4% of abundance Mass of the second isotope m2 =…

Q: Match the correct options. Nuclear reactions involving the combination of very small atomic…

A: Nuclear reactions that involves the combination of very small atomic elements to form heavier atoms…

Q: The nucleus of an atom emits a high energy electromagnetic wave. This nucleus has probably changed…

A: When a nucleus emmits a radiation of high energy electromagnetic wave then then it transformers to a…

Q: Elements that appear in the same column of the periodic table often share similar chemical…

A:

Q: half-life of an element is 20 years. In how many years will there be 12.5% of the initial material…

A: Given T1/2 = 20 years

Q: How can a charged atom (an ion) attract a neutral atom?

A: Given: A charged atom and a neutral atom

Q: Boron has two naturally occurring isotopes, boron-10, and boron-11. Boron-10 has a mass of 10.0129…

A:

Q: What property of an atom determines which type of element it is? O Number of Proton plus Neutrons O…

A: The number of electrons (e) is equal to the number of protons (p) in a atom.  The number is e/p in…

Q: The value of A in the element symbol below determines the isotope of the atom.

A:

Q: Which of these elements has an electron structure MOST similar to that of element X? a.) 3 b.)2…

A: Element X

Q: The electrical interaction between the nucleus and the electron is a force of

A: Attraction

Q: Elements chemically combine to form 1. atoms. O 2. other elements. 3. isotopes. 4. mixtures. 5.…

A: Elements chemically combine to form compounds.

Q: Energy stored in the nucleus of an atom is called: A) Nuclear energy B) Atomic energy C) Potential…

A:

The Bohr model

Students often get confused between Rutherford’s model and Bohr model of an atom. They interpret the postulates of both these models to be the same, which is incorrect. Rutherford’s model differs from Bohr’s model in the following ways: