Periodic Table Value Quiz Questions

Explanation
The charge of an atom is neutral because atoms consist of equal numbers of positively charged protons and negatively charged electrons. The positive charge of the protons cancels out the negative charge of the electrons, resulting in a net charge of zero.

Explanation
The correct answer is empty space. This is because atoms are mostly composed of empty space, with the nucleus and electron cloud occupying a very small fraction of the total volume. The nucleus, which contains protons and neutrons, is densely packed in the center of the atom, while the electron cloud, where electrons are found, surrounds the nucleus. However, the space between the nucleus and the electron cloud is vast, making up the majority of the atom's volume.

Explanation
Copper has 29 protons, which is the correct answer to the question. Protons are positively charged particles found in the nucleus of an atom, and the atomic number of an element corresponds to the number of protons it has. Since copper has 29 protons, it is the element with 29 protons.

Explanation
Since the atom is neutral, the number of protons must be equal to the number of electrons. Therefore, the atom has 40 protons to balance out the 40 electrons.

Explanation
The atomic number of an atom is equal to the number of protons in its nucleus. In this case, the atom has 22 electrons, which means it also has 22 protons. Therefore, the atomic number is 22.

Explanation
The atom's mass is found mostly in the nucleus. The nucleus is the central part of an atom that contains protons and neutrons. Protons have a positive charge and neutrons have no charge, together they make up the majority of the atom's mass. Electrons, on the other hand, are negatively charged particles that orbit around the nucleus in the electron cloud. While electrons contribute to the overall charge of the atom, they have a negligible mass compared to protons and neutrons. Therefore, the mass of an atom is primarily concentrated in the nucleus.

Explanation
An ion is an atom or molecule that has gained or lost electrons, resulting in a positive or negative charge. In this case, the particle has 25 protons and 22 electrons, indicating that it has gained 3 electrons. Therefore, the particle is an ion.

Explanation
Two atoms of oxygen always have a mass of 16 amu.

Explanation
Two atoms of the same element that have the same mass will have the same number of protons and the same number of electrons. The number of protons determines the atomic number and identifies the element, while the number of electrons determines the overall charge of the atom and its reactivity. Therefore, if two atoms have the same mass, it means they have the same number of protons and electrons. The number of neutrons can vary in isotopes of the same element, so it is not necessarily the same for atoms with the same mass.

Explanation
The atomic number of an atom is equal to the number of protons in the nucleus. In this case, the atom has 12 protons, so the atomic number is 12. The number of neutrons and electrons does not affect the atomic number.

Explanation
The Na atom has an atomic number of 11, which means it has 11 protons. Since atoms are neutral, it also has 11 electrons. However, the question asks for the total number of electrons in the Na atom below, which is 23. This is incorrect because it adds the atomic number of Na (11) to the atomic mass of Na (12), which is incorrect. Therefore, the correct answer is 10, which is the atomic number of Na.