which is most reactive Ga Ge As or Se
The reactivity of elements generally increases as you move down a group on the periodic table. Therefore, the most reactive element among Ga (gallium), Ge (germanium), As (arsenic), and Se (selenium) would be Ga.
which has the most valence electrons? Li Be B or O
Among Li, Be, B, and O, the element with the most valence electrons is O (oxygen). Oxygen has 6 valence electrons.
which is more similar to nitrogen (In Co S or Ts)
The element that is most similar to nitrogen would be phosphorus (P). In the given options, none of the elements (In, Co, S, or Ts) are more similar to nitrogen.
phosphorus is not an answer which is it (In Co S or Ts)
Among the options In (indium), Co (cobalt), S (sulfur), and Ts (tennessine), sulfur (S) is more similar to nitrogen. Both sulfur and nitrogen are nonmetals and they are both in Group 16 (or Group VI) of the periodic table, which means they have similar chemical properties.
which is most reactive N O F or Fe
Among N (nitrogen), O (oxygen), F (fluorine), and Fe (iron), fluorine (F) is the most reactive. Fluorine is the most reactive nonmetal and, being in Group 17 (Group VIIA) of the periodic table, it has a strong tendency to gain or share electrons to achieve a full outer electron shell. Iron (Fe), on the other hand, is a transition metal and its reactivity is lower compared to nonmetals like fluorine.
which is most reactive Tc Rb Sr Y
Among Tc (technetium), Rb (rubidium), Sr (strontium), and Y (yttrium), technetium (Tc) is the most reactive. Technetium is an artificial, radioactive element that is highly reactive due to its unstable nuclear configuration. Rubidium (Rb) and strontium (Sr) are both alkali metals and are quite reactive, but technetium surpasses them in reactivity. Yttrium (Y) is a transition metal and is generally less reactive compared to alkali metals and technetium.
which has the most similar properties to lithium Mn Ra Cs Be
Among the options provided (Mn, Ra, Cs, and Be), the element that has the most similar properties to lithium (Li) is beryllium (Be). Lithium and beryllium are both alkaline earth metals and belong to the same group (Group 2) on the periodic table. They share similar properties such as being lightweight, relatively soft, and having a low melting point. Manganese (Mn) is a transition metal and has different properties compared to lithium. Radium (Ra) is an alkaline earth metal but is much more reactive and radioactive than lithium. Cesium (Cs) is an alkali metal and is less similar in properties to lithium compared to beryllium.
which has the most neutrons? Mg Zr Db Ta
Among Mg (magnesium), Zr (zirconium), Db (dubnium), and Ta (tantalum), the element with the most neutrons is Db (dubnium). The number of neutrons in an atom is given by the difference between its atomic mass and atomic number. Dubnium (Db) has the highest atomic number among the given options, indicating that it has more protons and, therefore, more neutrons than magnesium, zirconium, and tantalum.
which has the most similar to Mg Ba Tm Kr Ar
Among Ba (barium), Tm (thulium), Kr (krypton), and Ar (argon), the element that is most similar to Mg (magnesium) is Ba (barium). Magnesium and barium both belong to Group 2 (or Group IIA) of the periodic table and have similar chemical properties. They are both alkaline earth metals, have two valence electrons, and exhibit similar reactivity. On the other hand, Tm, Kr, and Ar belong to different groups and have different properties compared to magnesium.
which is the most simular LI and HE
The element that is most similar to Li (lithium) is He (helium). Both lithium and helium are in Group 1 (or Group IA) of the periodic table and have similar properties. They both have low melting and boiling points, and they are both relatively lightweight. However, it's important to note that helium is a noble gas and does not readily form compounds, while lithium is an alkali metal and is more reactive.
which is the most simular Mg and Se
The element that is most similar to Mg (magnesium) is Ca (calcium), not Se (selenium). Magnesium and calcium are both alkaline earth metals that share similar properties such as high reactivity, high melting points, and the ability to form 2+ cations. Selenium (Se), on the other hand, is a nonmetal and has different properties compared to magnesium. Selenium is in the same group (Group 16) as oxygen and sulfur and tends to gain electrons to form anions with a charge of -2.
which is the most simular Al and Ga
The element that is most similar to Al (aluminum) is Ga (gallium). Aluminum and gallium are both in Group 13 (Group IIIA) of the periodic table and are classified as post-transition metals. They share similar properties such as relatively low melting points, high thermal and electrical conductivity, and the ability to form 3+ cations. They also have similar chemical reactivity. Therefore, aluminum and gallium are considered to be chemically similar elements.
which would be least likely to react with sodium Cl Br I Rn
Rn (radon) would be the least likely to react with sodium (Na). Rn is a noble gas and, like other noble gases, it has a full complement of valence electrons and is highly stable. Noble gases are generally unreactive and do not readily form compounds with other elements. On the other hand, Cl (chlorine), Br (bromine), and I (iodine) are halogens and are more likely to react with sodium to form ionic compounds.
which has the most protons H N Fe Au
Among H (hydrogen), N (nitrogen), Fe (iron), and Au (gold), the element with the most protons is Au (gold). Gold has 79 protons, whereas hydrogen has 1, nitrogen has 7, and iron has 26 protons.
which has the most electrons Mg Ca Be Sr
Among Mg (magnesium), Ca (calcium), Be (beryllium), and Sr (strontium), the element with the most electrons is Sr (strontium). Strontium has 38 electrons, whereas magnesium has 12, calcium has 20, and beryllium has 4 electrons.
place the following elements in order of incresing atomic mass O B C
O (oxygen), B (boron), C (carbon)
The atomic mass increases in the order B < C < O. The atomic mass of boron (B) is approximately 10.81 atomic mass units (AMU), carbon (C) is approximately 12.01 AMU, and oxygen (O) is approximately 16.00 AMU.
place the following elements in order of decreasing atomic number Mg Sr Ca
Ca (calcium), Sr (strontium), Mg (magnesium)
The atomic numbers of the elements are as follows: Calcium (Ca) has an atomic number of 20, strontium (Sr) has an atomic number of 38, and magnesium (Mg) has an atomic number of 12. Therefore, the elements arranged in decreasing order of atomic number are Ca > Sr > Mg.
of the following correctly places elements in order of decreasing atomic mass He O F C Xe Ar Ne He Li H Na K Co NI CU Zn
The elements in order of decreasing atomic mass are as follows:
Co (cobalt) > Cu (copper) > Zn (zinc) > Ni (nickel) > K (potassium) > Na (sodium) > H (hydrogen) > He (helium) > C (carbon) > Ar (argon) > Ne (neon) > Xe (xenon) > F (fluorine) > O (oxygen) > Li (lithium)
Please note that the ordering of atomic masses may vary slightly depending on the exact values used.
of the following correctly places elements in order of decreasing atomic mass He O F C. Xe Ar Ne He. Li H Na K. Co NI Cu Zn.
out of the four which places it correct the FIRST TIME
The sequence that correctly places the elements in order of decreasing atomic mass is:
Xe > Co > Cu > Zn > Ni > K > Na > C > O > F > H > He > Li > Ne > Ar
The elements are arranged starting with xenon (Xe), which has the highest atomic mass, and they proceed in descending order until reaching argon (Ar), which has the lowest atomic mass among the mentioned elements.