Which one is not an element below? a. K b. CacK_3 c. Mg d. Xe According to atomi

Question

Which one is not an element below? a. K b. CacK_3 c. Mg d. Xe According to atomic theory, where elements react, four atoms combine in (choose one) a. a simple whole number ratio, that is unique for each set of elements b. exactly 1: 1 ratio c. one of more simple whole-number ratios d. random proportion relative masses in the modern periodic table are based on the value for ______. A molecule is a. a collection of like atoms b. conserved in chemical reactions c. a group of atoms chemically bonded to each other d. indivisible Thomson used a cathode-ray tube to discover that cathode rays a. Are deflected by electric fields b. are radiation similar to x-rays c. Could ionize air inside the tube d. could ionize the air outside the far end of the tube Compared to the charge of an electron (1-) the charge of an alpha partite is about a. -4 b. -1 c. +1 d. 2+ From his gold-foil experiment Rutherford concluded that atoms consist mainly of a. electron b. empty space c. neutron d. protons The positively charged part of the atom is its a. cation b. nucleus c. outer electrons d. widespread cloud of the electrons Which particle has approximately the same mass a. electrons and neutrons b. electrons and protons c. electrons, neutrons and protons d. neutrons and protons A neutral atom has 5 electrons and 6 neutrons, the atomic number is_______. The maximum number of electrons in an atomic orbital_______. The element tin (Sn) occurs naturally as ten isotopes. Each of these isotopes has a. 50 protons b. 50 electrons c. a different number of neutrons d. all of the above Elements within a period of the periodic table have the same number of a. electrons in the outermost shell b. neutrons in the nucleus c. occupied main shells d. protons in the nucleus Alkali metals are member of group_____. How many dots surround F in the lewis symbol for F a. 1 b. 5 c. 7 d. 9 A potassium ion and an argon atom have the same a. electron configuration b. net charge c. nuclear charge d. properties Mg and N react to form MgN_2, an ionic compound. How many electrons are there in the shell of the n^+ ion?________ the correct name for Al_2S_2 is _______. The bond in N_ is a. double covalent b. ionic c. single covalent d. triple covalent which of the following bond is most polar? a. C-C b. C-F c. C-O d. F-F to gain an octet of electrons in forming, a carbon atom must share an electron with ach of a. 2H atoms b. 4 H atoms c. 6 H atoms d. 8 H atoms formula for sodium bromide is_______. Match the formula in the left column with the molecular shape in the right column which of the following is not a property of bases? A. on the b. reacts to to form acids c. taste bitter d. turn litmus blue in general, when an acid and a base are mixed. a. a new acid and a salt are formed b. a new base and a salt are formed c. no reaction occurred d. a salt and water are formed write down the equation when hydrogen trioxide is dissolved in water? Many medicines have a bitter taste, which manufactures attempt to. many medicines are probably a. acids b. bases c. salts d. neutral NH_3 reacts with water to form ____ ion.

Explanation / Answer

14. b

CaH2 is compound not element

15. a

16.

17.c

18.a

19. d

20.b

21.b

22.d

23. atomic mass 11

24.Two

25.a

26.c

27.IA group

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.