Grade 10 Questions On Atomic Structure

The atomic number is the larger number associated with the element. In this case, it's 1.

The chemical symbol for calcium is Ca.

Californium is a chemical element with the atomic number 98, which corresponds to the number of protons in its nucleus. In a neutral atom, the number of electrons is equal to the number of protons. Therefore, Californium has 98 electrons.

Californium is a chemical element with the symbol Cf and atomic number 98. The atomic number represents the number of protons in the nucleus of an atom. Therefore, Californium has 98 protons.

Atomic # = # of protons

Californium's atomic number is 98. The atomic number represents the number of protons in the nucleus of an atom. Since Californium has 98 protons, its atomic number is 98.

Potassium is a metal because it is a highly reactive alkali metal that belongs to Group 1 of the periodic table. It has a low ionization energy and readily loses its single valence electron to form a positive ion. Metals generally have lustrous appearances, conduct electricity and heat, and are malleable and ductile. Potassium exhibits these characteristics, making it a typical example of a metal.

The formula for calculating the number of neutrons in an element is atomic mass - atomic number. This is because the atomic mass represents the total mass of an atom, which includes both the protons and neutrons. The atomic number represents the number of protons in an atom. By subtracting the atomic number from the atomic mass, we can determine the number of neutrons present in the atom.

Californium's atomic mass is 251.

The atomic mass of an element is the average mass of the atoms of that element, taking into account the different isotopes and their abundance. Phosphorus has several isotopes, but the most common one is phosphorus-31, which has a mass of 31 atomic mass units. Therefore, the correct answer is 31.

Zinc, with the chemical symbol Zn, has an atomic mass of approximately 65.38 atomic mass units (amu).

Californium has 153 neutrons. Neutrons are subatomic particles that have no charge and are found in the nucleus of an atom. The number of neutrons in an atom can vary, but it is determined by subtracting the atomic number (which represents the number of protons) from the atomic mass. In the case of Californium, the atomic mass is 251 and the atomic number is 98, so subtracting 98 from 251 gives us 153 neutrons.

Beryllium (Be) has an atomic number of 4, which indicates the number of protons in its nucleus. The atomic mass of Be is approximately 9, which is the sum of the protons and neutrons in the nucleus. Therefore, the number of neutrons in Be can be calculated by subtracting the atomic number from the atomic mass. In this case, 9 - 4 = 5, so Be has 5 neutrons.

Atomic mass - atomic # = # of neutrons

The Lewis Dot diagram for carbon would have 4 dots, representing its 4 valence electrons. Carbon is in Group 14 of the periodic table, and elements in this group typically have 4 valence electrons.