Atoms do not always contain the same number
Yes, in chemical reactions atoms are neither created nor destroyed, nor changed from one kind to another. Those things can only happen in nuclear reactions. Chemistry deals with how atoms combine with one another.
The link up of atoms in ice remains the same when it turns to water. However, the arrangement of the atoms changes from a rigid, crystalline structure to a more fluid and less ordered arrangement.
Elements have a certain number of protons(+), neutrons(0) and electrons(-). The atomic number shows the number of protons and electrons in the element (has to have the same number of each to stay stable). The atomic mass shows the number of neutrons. For example, Hydrogen has an atomic mass of ~1.01 (and an atomic number of 1). That means that it has 1 electron and 1 proton but no neutron (1 proton+0 neutrons=1). Helium has an atomic mass of ~4.00 (and an atomic number of 2). That means that it has 2 electrons, 2 protons and 2 neutrons (2 protons+2 neutrons=4). Hope you can understand. :S
In a physical change, the bonding between atoms remains intact. The change involves the rearrangement of atoms or molecules without breaking or forming new chemical bonds. This means the fundamental structure and composition of the substance remain the same.
The sugar and phosphate group of nucleotides never change. There are four possible nitrogenous bases and thus it is the only part of nucleotides that can change.
In a balanced chemical reaction, the number of atoms entering the reaction as reactants is equal to the number of atoms leaving the reaction as products. This is because of the law of conservation of mass, which states that matter cannot be created or destroyed in a chemical reaction.
Stay the same as....?. When combining they may share/donate electron(s) to neighbouring atoms.
In chemical reactions the number of atoms stay the same no matter how they are arranged. So, their total mass stays the same.
The amount of atoms stay the same. The element does not change chemically only physically.
Yes they do
the number would stay the same
The element won't stay the same because the element is determined by its number of protons. The number of protons is also the atomic number.
Yes, in chemical reactions atoms are neither created nor destroyed, nor changed from one kind to another. Those things can only happen in nuclear reactions. Chemistry deals with how atoms combine with one another.
It would stay the same unless some atoms escaped.
For an element to stay the same, the number of protons in its nucleus (atomic number) must remain constant. This defines the element's identity on the periodic table and determines its unique chemical properties.
If you add zero to a number, the number will stay the same.
Indeed by the Law of Conservation of Mass, mass cannot be lost or gained through a reaction. Similarly, atoms cannot be lost, gained or somehow transformed themselves-only rearranged into different compounds. This means there are still going to be the same amount of Hydrogen atoms after a reaction as there were before.