Rutherford used positively charged particles to investigate the structure of the atom. The results surprised him, and he developed the atomic model shown below. What surprising result is explained using this model?
A few positive particles bounced back because they were pushed away from the positive center.
Which elements is likely more reactive and why?
Which element is likely more reactive, and why?
Element 2 is
more reactive because it does not have a full valence shell, so it will attract electrons.
Which element is likely more reactive?
Hydrogen
is a very reactive gas, and the alkali metals are even more reactive. In fact, they are the most reactive metals and, along with the elements in group 17, are the most reactive of all elements.
Which statement describes the location of metalloids on the periodic table quizlet?
Which statement describes the location of metalloids on the periodic table?
The metalloids are located below nonmetals and above metals within a group
. Isra is analyzing the properties of several samples of elements to find out which sample is a metalloid.
What does an atomic physicist determines that an atom is composed of 8?
What is an atomic nucleus? An atomic physicist determines that an atom is composed of
8 positively charged particles
and has a mass of 15 amu. … The atom has 7 neutrons and 8 protons. The atomic symbol represents potassium-40 (K-40), a radioactive isotope that has 19 protons and 21 neutrons.
What is the least reactive element in Group 2?
The least reactive element in group 2 is
beryllium
. Even at red heat beryllium will not react with water and it does not react with dinitrogen (N
2
).
What is the most reactive metal and why?
Caesium
, the most reactive metal in the periodic table, reacts extremely violently – hence why it can't be demonstrated in a classroom! This can be compared to other common metals, such as iron and copper, which produce no reaction when dropped into water.
Which element is likely more reactive and why element 1 is more reactive?
Element 1 is more reactive
because it has more electrons in its valence shell and is farther to the right on the periodic table
. Element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons.
Which is the least reactive metal?
Platinum
is the least reactive of all the options. Aluminium, iron are also formed in combined forms in the natural surroundings.
What makes an element reactive?
The number of electrons in the outermost shell of an atom determines its reactivity
. Noble gases have low reactivity because they have full electron shells. … Alkali metals are highly reactive because they readily lose the single electron in their outermost shell.
What surprising result is explained using this model quizlet?
What surprising result is explained using this model?
A few positive particles bounced back because they were pushed away from the positive center
.
Which best describes the results of Becquerel's experiments?
Which best describes the results of Becquerel's experiments?
Both formed images when placed in their respective places
.
Which one of the following is a metalloid quizlet?
The six metalloids are
boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), and tellurium (Te)
. The properties of the metalloids have characteristics in between that of the metals and the nonmetals. They are good conductors of heat and electricity, but they are not good conductors or insulators.
Which is the best conclusion about particles a and B?
Both particles are in the same atom. Which is the best conclusion about Particles A and B?
Particle A orbits the nucleus, and Particle B is located in the nucleus.
What is the atomic number of this nucleus?
The atomic number or proton number (symbol Z) of a chemical element is
the number of protons found in the nucleus
of every atom of that element. The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus.
How does an atom change if all of its electrons are removed quizlet?
How does an atom change if all of its electrons are removed?
The atom becomes positively charged
.
