Are all atoms of the same element exactly the same? each element is made up of identical particles of matter called atoms. all the atoms in a pure substance or element are identical to one another but different to the atoms in a different element .
Are all atoms of the same element the same?
No. Two atoms of the same chemical element are typically not identical . First of all, there is a range of possible states that the electrons of an atom can occupy. Two atoms of the same element can be different if their electrons are in different states.
Are all atoms of the same element the same size?
Colm – So Les all atoms of the same material are the same size but different items of different materials are different sizes. So for instance the single smallest item is hydrogen and a single hydrogen is about one twentieth of a nanometre across.
Do all atoms of the same element have in common?
Atoms of the same element always have the same number of protons , same Z, but often have different numbers of neutrons, therefore, different mass numbers.
Are all atoms of an element identical?
each element is made up of identical particles of matter called atoms. all the atoms in a pure substance or element are identical to one another but different to the atoms in a different element .
Are atoms of different elements different?
What makes atoms of various elements different from each other is their number of protons . In other words, each element is composed of atoms that have a specific number of protons.
Can atoms be different sizes?
Atoms of different elements are different sizes , but 10 – 10 m can be thought of as a rough value for any atom. It is also a good approximation to think of atoms as spherical in shape, although they are not always so. The atom with the smallest mass is the hydrogen atom; its mass is about 10 – 27 kg.
Are elements the same size?
As you move down an element group (column), the size of atoms increases . This is because each atom further down the column has more protons and neutrons and also gains an additional electron energy shell. As you move across an element period (row), the overall size of atoms decreases slightly.
Why are atoms of elements the same?
All atoms of the same element have the same number of protons , but some may have different numbers of neutrons. For example, all carbon atoms have six protons, and most have six neutrons as well. But some carbon atoms have seven or eight neutrons instead of the usual six.
What do all atoms have in common?
Most atoms contain all three of these types of subatomic particles— protons, electrons, and neutrons .
Who said atoms of the same element are exactly alike?
Dalton proposed that every single atom of an element, such as gold, is the same as every other atom of that element. He also noted that the atoms of one element differ from the atoms of all other elements. Today, we still know this to be mostly true.
What do all atoms of an element have the same number of?
All atoms of an element have the same number of protons , and every element has a different number of protons in its atoms.
How are 2 atoms of the same element alike?
Atoms of the same element consist of the same atomic number that is number of protons or electrons and different mass number that is number of neutrons . This variation or change in the number of neutrons in an atom gives rise to different isotopes of an element.
Are atoms of different elements similar or dissimilar?
1 Answer. The atoms of different elements are dissimilar .
Are all protons exactly the same?
All protons are identical . For example, hydrogen protons are exactly the same as protons of helium and all other element, or pure substances. However, atoms of different elements have different numbers of protons.
What is the biggest atom?
Cesium (Cs) , tucked in the lower left hand corner of the table, has the largest known atoms. The atomic radius of Cs is given variously as 273.1 pm [1], 265 pm [2], 265.5 pm [3] or 260 pm [4].
What would happen if atoms were as big as marbles?
And if the nucleus was expanded to the size of a marble, the outer edge of the atom would be nearly a football field away . A quick primer on the atom: Atoms are composed of protons, neutrons and electrons.
Why are atoms different sizes?
As the charge on the nucleus becomes larger, the nucleus can hold a constant number of electrons more tightly . As a result, the atoms or ions become significantly smaller.
What statement is true about the atoms of any element?
All the atoms of a given element are identical in that they have the same number of protons , one of the building blocks of atoms (see below). They are also different from the atoms of all other elements, as atoms of different elements have different number of protons.
What is the smallest atom in the world?
The smallest atom is helium with a radius of 31 pm, while the largest known is caesium at 298 pm. Although hydrogen has a lower atomic number than helium, the calculated radius of the hydrogen atom is about 70% larger.
Who said atoms of different elements are different?
The concept that atoms play a fundamental role in chemistry is formalized by the modern atomic theory , first stated by John Dalton , an English scientist, in 1808. It consists of three parts: All matter is composed of atoms. Atoms of the same element are the same; atoms of different elements are different.
Is Dalton’s atomic theory correct?
Dalton’s atomic theory. Democritus first suggested the existence of the atom but it took almost two millennia before the atom was placed on a solid foothold as a fundamental chemical object by John Dalton (1766-1844). Although two centuries old, Dalton’s atomic theory remains valid in modern chemical thought .
What was JJ Thomson atomic theory?
Summary. J.J. Thomson’s experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons . Thomson proposed the plum pudding model of the atom, which had negatively-charged electrons embedded within a positively-charged “soup.”
Do all atoms of an element have the same mass?
REMEMBER: Atoms of the same chemical element do not always have the same mass because, although the number of protons in the nucleus is the same for all atoms of the same element, the number of neutrons is not. Most elements as they occur naturally on earth are mixtures of several isotopes.
How do atoms of the same elements compare?
Do atoms of the same element have the same chemical properties?
All the Isotopes of an Element Have Identical Chemical Properties . All the Isotopes of an element have identical chemical properties because they have the same number of electrons as an atom of that element but they have different numbers of neutrons.
What are the sizes of atoms in the same element?
Under most definitions the radii of isolated neutral atoms range between 30 and 300 pm (trillionths of a meter), or between 0.3 and 3 ångströms . Therefore, the radius of an atom is more than 10,000 times the radius of its nucleus (1–10 fm), and less than 1/1000 of the wavelength of visible light (400–700 nm).
Why are atoms different sizes?
As the charge on the nucleus becomes larger, the nucleus can hold a constant number of electrons more tightly . As a result, the atoms or ions become significantly smaller.
What determines the size of an atom?
Because electrons are what take up space in atoms, the result is that the size of the biggest filled orbital determines the size of the atom or ion.
