All Atoms Of The Same Element Have The Same

Why do all atoms of an element have the same atomic number?

All Atoms Of The Same Element Have The Same Number O
All Atoms Of The Same Element Have The Same Number Of Protons
All Atoms Of The Same Element Have The Same Quizlet
All Atomas Of The Same Element Have The Same

When you have finished the test, click on the ANSWERS button and see how well you have done. Test Number PS-1030. Quick Questions. 1) All atoms are the same. 2) All atoms of the same element are the same. 3) All atoms contain neutrons. 4) Protons have more mass than neutrons. As a result, they will all have the same chemical reactivity. For example, all elements in group 1 have a single electron in the valence shells, so they easily give up that electron to become +1.

1 Answer

Because atoms of an element has, essentially, the same number of protons.

Explanation:

For ground state (no charge) atoms, you have to remember the following facts:

1.) The atomic number is the same as the number of protons.
2.) The number of electrons is the same as the number of protons.
3.) The atomic mass is the sum of the number of protons and neutrons.

For ions (which may either have a positive or negative charge), only the number of electrons are being changed. If the ion is negative it means that an electron has been added to the configuration. If the ion is positive, it means that an electron is removed from the configuration.

For example,

#Na# (atomic number = 11) : #1s^2##2s^2##2p^6##color (red) (3s^1)# (ground state)

#Na^'+1'#(atomic number = 11) : #1s^2##2s^2##color (blue) (2p^6)# (lost 1 #e^-#)

#Cl# (atomic number = 17) : #1s^2##2s^2##2p^6##3s^2##color (red) (3p^5)# (ground state)

#Cl^'-1'# (atomic number = 17) : #1s^2##2s^2##2p^6##3s^2##color (red) (3p^6)# (gain 1 #e^-#)

All atoms of the same element have the same number of protons true or false

For isotopes (elements that have different masses, no charge), only the number of neutrons has been changed. Examples are Carbon-12, Carbon-13, and Carbon-14.

Carbon-12 : 6 protons + #color (green) ('6 neutrons')#
Carbon-13 : 6 protons + #color (magenta) ('7 neutrons')#
Carbon-14 : 6 protons + #color (orange) ('8 neutrons')#

Because none of these situations change the number of protons, the atomic number stays the same regardless.

Quick Check

Read each of the Quick Questions below and write down your answer.
When you have finished the test, click on the ANSWERS button and see how well you have done.

Test Number PS-1030

Quick Questions

1) All atoms are the same. (True / False)?

2) All atoms of the same element are the same. (True / False)?

All atoms of the same element have the same quizlet

3) All atoms contain neutrons. (True / False)?

4) Protons have more mass than neutrons. (True / False)?

5) Electrons have less mass than either protons or neutrons. (True / False)?

6) In a neutral atom there are always equal numbers of protons and electrons. (True / False)?

7) Isotopes are a family of atoms all of which have the same number of electrons. (True / False)?

8) Electrons are found in clouds called orbitals surrounding the atomic centers. (True / False)?

9) Electrons are sometimes exchanged between atoms. (True / False)?

10) Ions are atoms that have gained or lost electrons. (True / False)?

11) Ions always have a positive charge. (True / False)?

12) Atoms are at their most stable when their outermost electron energy level is completely filled or completely empty of electrons. (True / False)?

13) Hydrogen atoms and Helium atoms both have two protons in their atomic centers, but different numbers of neutrons. (True / False)?

14) Hydrogen and Deuterium atoms both have the same number of protons in their atomic centers, but different numbers of neutrons. (True / False)?

15) The atomic mass of all isotopes within a family of atoms is always the same. (True / False)?

All Atoms Of The Same Element Have The Same Number O

16) The atomic number of all isotopes within a family of atoms is always the same. (True / False)?

17) Atoms of the same element can sometimes share two electrons. (True / False)?

18) Atoms of different elements can sometimes share electrons. (True / False)?

19) Atoms share electrons so as to fill energy levels. (True / False)?

20) Only eight electrons can occupy an one orbital. (True / False)?

All Atoms Of The Same Element Have The Same Number Of Protons

21) Two electrons shared between two atoms creates a force or bond that holds the atoms together. (True / False)?

22) More than two electrons are sometimes shared between atoms. (True / False)?

23) Covalent bonds can only form between atoms that can ionize. (True / False)?

24) Ionization of a hydrogen atom produces a proton. (True / False)?

25) Methane is an isotope of carbon. (True / False)?

26) Water molecules are smaller than molecules of oxygen gas. (True / False)?

27) Hydrogen and oxygen share the electrons equally in the covalent bonds of a water molecule. (True / False)?

All Atoms Of The Same Element Have The Same Quizlet

28) A polar molecule is one that is most stable at the poles of reaction. (True / False)?

29) Water is a liquid at room temperature because the water molecules are strongly sympathetic to one another. (True / False)?

All Atomas Of The Same Element Have The Same

30) Hydrophilic substances dissolve readily and easily in water. (True / False)?

Answers to Part 1	Lecture Notes - Part 1
Physical Structure

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