1. The central part of the atom is
(A) proton (B) electron (C) nucleus (D) Nucleon
2. What is the electric charge of proton is
(A) 10 4.8 10 esu
(B) 10 4.8 10 esu
(C) 0.000548 amu (D) 1.007277 amu
3. What is the relative charge of electron is
(A) +1 (B) 0 (C) -1 (D) none
4. One molecule of oxygen is represented by the
(A) 2 O (B) 0 (C) O2 (D) O3
5. ‘Ga’ is the symbol for
(A) Germanium (B) Gallium (C) Tungsten (D) Curium
6. Einsteinium element is derived from
(A) Alfred Nobel (B) Albert Einstein (C) Neils Bohr (D) Madam Curie
7. The fundamental particle electron was discovered by
(A) J.Chadwick (B) Gold Stein (C) J.J. Thomson (D) J.J. Berzelius
8. A student has written the symbols for the following elements which is wrong symbol?
(A) Magnesium – Mg (B) Sodium – NA
(C) Chromium – Cr (D) Aluminium – Al
9. Which is the most abundant element in the universe?
(A) Oxygen (B) Nitrogen (C) Hydrogen (D) fluorine
10. Symbol of the electron is
(A) 0
1e (B) 1
1p (C) 1
0n (D) None
11. Latin name of Antimony is
(A) Stannum (B) Aurum (C) Stibium (D) Plumbum
if you answer all the questions correctly I will mark as brainlist
Answers
Answer:
1.c) nucleus
2 a)+104.810 esu
3.c)-1
4.c)O2
5.b)Galium
6.B)Elbert Einstein
7.c)J.J Thomson
8.c) chromium-cr
9.b) Nitrogen
10.1e1
11.c)stibium
12.
Answer:
1.An atom is composed of two regions: the nucleus, which is in the center of the atom and contains protons and neutrons, and the outer region of the atom, which holds its electrons in orbit around the nucleus.
2. Protons have a positive electrical charge of one (+1) and a mass of 1 atomic mass unit (amu), which is about 1.67×10−27 kilograms.
3. Particle Symbol Relative Charge
proton p = + =+1
electron =e− = −1
neutron =n0 = 0
4. The symbol for the element oxygen, O, represents both the element and one atom of oxygen. A molecule of oxygen, O2, contains two oxygen atoms; the subscript 2 in the formula must be used to distinguish the diatomic molecule from two single oxygen atoms.
6. Einsteinium can be obtained in milligram quantities from the neutron bombardment of plutonium in a nuclear reactor.
Origin of the name: Einsteinium is named after the renowned physicist Albert Einstein
Discovered by: Albert Ghiorso and colleagues
Discovery date: 1952
7. Electron was discovered by J. J. Thomson in 1897 when he was studying the properties of cathode ray.
9. Hydrogen is the most abundant element in the Universe; helium is second.
10. Particle Symbol Charge
electron =e- =. -1
proton p =. +. = +1
neutron no =. 0. = 0
11.
Antimony – Stibium (Sb)
The Latin 'stibium' derives from the Greek word 'stíbi', meaning eye paint, referring to the use of antimony compounds as an ancient eye cosmetic. This word is in turn likely derived from Arabic or Egyptian. Few countries refer to antimony as stibium today, despite its symbol.